{"product_id":"boka-bt40-er-spannzangenfutter-mit-0-005mm-rundlauf-und-g2-5-wuchtung","title":"Boka BT40-ER collet chuck with 0.005mm concentricity and G2.5 balancing ","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cmeta name=\"viewport\" content=\"width=device-width,initial-scale=1.0\"\u003e\u003c\/p\u003e\n\u003cdiv class=\"product-container\"\u003e\n\n\u003cheader class=\"product-header\"\u003e\u003ch1\u003e High-precision BT40-ER collet chuck series\u003c\/h1\u003e\n\n\u003cp\u003e Discover our comprehensive, ready-to-use ER collet chucks. This series is manufactured with an extremely low runout of \u003cb\u003e0.005 mm TIR\u003c\/b\u003e and precision balanced to \u003cb\u003eG2.5 at 20,000 rpm\u003c\/b\u003e . Thanks to a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e and \u003cb\u003eAT3 taper accuracy,\u003c\/b\u003e these chucks offer the highest precision and durability for demanding machining requirements.\u003c\/p\u003e\n\n \u003cp\u003e\u003ca href=\"#specifications\" class=\"view-specs-link\"\u003eShow technical data\u003c\/a\u003e \u003c\/p\u003e\u003c\/header\u003e\u003chr\u003e\n\n\u003cdiv id=\"table-of-contents\" class=\"table-of-contents\"\u003e\n\n\u003cinput type=\"checkbox\" id=\"toc-toggle\" class=\"toc-checkbox\" checked\u003e\u003clabel for=\"toc-toggle\" class=\"toc-title\"\u003e\u003ch2\u003e Table of contents\u003c\/h2\u003e\n\u003cdiv class=\"toc-content\"\u003e\n\n \u003ca href=\"#bt40-er16-70\"\u003eBT40-ER16-70 M12*1.75\u003c\/a\u003e \u003ca href=\"#bt40-er25-70\"\u003eBT40-ER25-70 M12*1.75\u003c\/a\u003e \u003ca href=\"#bt40-er32-70\"\u003eBT40-ER32-70 M12*1.75\u003c\/a\u003e \u003ca href=\"#bt40-er40-80\"\u003eBT40-ER40-80 M16*2.0\u003c\/a\u003e \u003ca href=\"#bt40-er16-100\"\u003eBT40-ER16-100 M12*1.75\u003c\/a\u003e \u003ca href=\"#bt40-er25-100\"\u003eBT40-ER25-100 M12*1.75\u003c\/a\u003e \u003ca href=\"#bt40-er20-100\"\u003eBT40-ER20-100 M12*1.75\u003c\/a\u003e \u003ca href=\"#bt40-er32-100\"\u003eBT40-ER32-100 M12*1.75\u003c\/a\u003e \u003ca href=\"#bt40-er40-100\"\u003eBT40-ER40-100 M12*1.75\u003c\/a\u003e \n\n\u003c\/div\u003e\n\n\u003c\/label\u003e\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv id=\"bt40-er16-70\" class=\"product-detail-block\"\u003e\n\n\u003ch2\u003e BT40-ER16-70 M12*1.75\u003c\/h2\u003e\n\n \u003cp\u003eThe \u003cb\u003eBoka BT40-ER16-70\u003c\/b\u003e chuck features extremely low runout of \u003cb\u003e0.005mm TIR\u003c\/b\u003e and high-precision \u003cb\u003eAT3 taper accuracy\u003c\/b\u003e . It is precision balanced to \u003cb\u003eG2.5 at 20,000 rpm\u003c\/b\u003e and features \u003cb\u003einternal spindle cooling\u003c\/b\u003e and a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . Complete with an \u003cb\u003eM12 thread\u003c\/b\u003e and a retaining nut, it is ready for use on \u003cb\u003emilling and drilling machines\u003c\/b\u003e .\u003c\/p\u003e\n\n\u003ch3\u003e Product details and benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eExtremely low runout:\u003c\/b\u003e The conical surface is ground for high \u003cb\u003eAT3 accuracy\u003c\/b\u003e , which guarantees a runout of only \u003cb\u003e0.005mm TIR\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eIdeal for high-speed applications:\u003c\/b\u003e With a balance of \u003cb\u003eG2.5 at 20,000 rpm,\u003c\/b\u003e the chuck minimizes vibrations and ensures higher machining quality.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eHigh durability and surface quality:\u003c\/b\u003e Made of hardened alloy steel with a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . All critical surfaces are precision ground and smoothed.\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cb\u003eImproved efficiency and versatility:\u003c\/b\u003e The \u003cb\u003einternal spindle cooling function\u003c\/b\u003e increases performance. The chuck is suitable for \u003cb\u003edrilling, milling, and CNC spindles\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eComplete set with technical detail:\u003c\/b\u003e The chuck has an \u003cb\u003eM12 thread\u003c\/b\u003e for tension bolts and is supplied complete with a \u003cb\u003eunion nut\u003c\/b\u003e .\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003ca href=\"#table-of-contents\"\u003eBack to table of contents\u003c\/a\u003e \n\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv id=\"bt40-er25-70\" class=\"product-detail-block\"\u003e\n\n\u003ch2\u003e BT40-ER25-70 M12*1.75\u003c\/h2\u003e\n\n\u003cp\u003e The \u003cb\u003eBoka BT40-ER25-70\u003c\/b\u003e chuck features extremely low runout of \u003cb\u003e0.005mm TIR\u003c\/b\u003e and high-precision \u003cb\u003eAT3 taper accuracy\u003c\/b\u003e . It is precision balanced to \u003cb\u003eG2.5 at 20,000 rpm\u003c\/b\u003e and features \u003cb\u003einternal spindle cooling\u003c\/b\u003e and a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . Complete with an \u003cb\u003eM12 thread\u003c\/b\u003e and a union nut, it is ready for use on \u003cb\u003emilling and drilling machines\u003c\/b\u003e .\u003c\/p\u003e\n\n\u003ch3\u003e Product details and benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e \n\u003cb\u003eExtremely low runout:\u003c\/b\u003e The conical surface is ground for high \u003cb\u003eAT3 accuracy\u003c\/b\u003e , which guarantees a runout of only \u003cb\u003e0.005mm TIR\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eIdeal for high-speed applications:\u003c\/b\u003e With a balance of \u003cb\u003eG2.5 at 20,000 rpm,\u003c\/b\u003e the chuck minimizes vibrations and ensures higher machining quality.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eHigh durability and surface quality:\u003c\/b\u003e Made of hardened alloy steel with a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . All critical surfaces are precision ground and smoothed.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eImproved efficiency and versatility:\u003c\/b\u003e The \u003cb\u003einternal spindle cooling function\u003c\/b\u003e increases performance. The chuck is suitable for \u003cb\u003edrilling, milling, and CNC spindles\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eComplete set with technical detail:\u003c\/b\u003e The chuck has an \u003cb\u003eM12 thread\u003c\/b\u003e for tension bolts and is supplied complete with a \u003cb\u003eunion nut\u003c\/b\u003e .\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003ca href=\"#table-of-contents\"\u003eBack to table of contents\u003c\/a\u003e \n\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv id=\"bt40-er32-70\" class=\"product-detail-block\"\u003e\n\n\u003ch2\u003e BT40-ER32-70 M12*1.75\u003c\/h2\u003e\n\n \u003cp\u003eThe \u003cb\u003eBoka BT40-ER32-70\u003c\/b\u003e chuck features extremely low runout of \u003cb\u003e0.005mm TIR\u003c\/b\u003e and high-precision \u003cb\u003eAT3 taper accuracy\u003c\/b\u003e . It is precision balanced to \u003cb\u003eG2.5 at 20,000 rpm\u003c\/b\u003e and features \u003cb\u003einternal spindle cooling\u003c\/b\u003e and a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . Complete with an \u003cb\u003eM12 thread\u003c\/b\u003e and a retaining nut, it is ready for use on \u003cb\u003emilling and drilling machines\u003c\/b\u003e .\u003c\/p\u003e\n\n\u003ch3\u003e Product details and benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eExtremely low runout:\u003c\/b\u003e The conical surface is ground for high \u003cb\u003eAT3 accuracy\u003c\/b\u003e , which guarantees a runout of only \u003cb\u003e0.005mm TIR\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eIdeal for high-speed applications:\u003c\/b\u003e With a balance of \u003cb\u003eG2.5 at 20,000 rpm,\u003c\/b\u003e the chuck minimizes vibrations and ensures higher machining quality.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eHigh durability and surface quality:\u003c\/b\u003e Made of hardened alloy steel with a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . All critical surfaces are precision ground and smoothed.\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cb\u003eImproved efficiency and versatility:\u003c\/b\u003e The \u003cb\u003einternal spindle cooling function\u003c\/b\u003e increases performance. The chuck is suitable for \u003cb\u003edrilling, milling, and CNC spindles\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eComplete set with technical detail:\u003c\/b\u003e The chuck has an \u003cb\u003eM12 thread\u003c\/b\u003e for tension bolts and is supplied complete with a \u003cb\u003eunion nut\u003c\/b\u003e .\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003ca href=\"#table-of-contents\"\u003eBack to table of contents\u003c\/a\u003e \n\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv id=\"bt40-er40-80\" class=\"product-detail-block\"\u003e\n\n\u003ch2\u003e BT40-ER40-80 M16*2.0\u003c\/h2\u003e\n\n\u003cp\u003e The \u003cb\u003eBoka BT40-ER40-80\u003c\/b\u003e chuck features extremely low runout of \u003cb\u003e0.005mm TIR\u003c\/b\u003e and high-precision \u003cb\u003eAT3 taper accuracy\u003c\/b\u003e . It is precision balanced to \u003cb\u003eG2.5 at 20,000 rpm\u003c\/b\u003e and features \u003cb\u003einternal spindle cooling\u003c\/b\u003e and a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . Complete with an \u003cb\u003eM16 thread\u003c\/b\u003e and a union nut, it is ready for use on \u003cb\u003emilling and drilling machines\u003c\/b\u003e .\u003c\/p\u003e\n\n\u003ch3\u003e Product details and benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e \n\u003cb\u003eExtremely low runout:\u003c\/b\u003e The conical surface is ground for high \u003cb\u003eAT3 accuracy\u003c\/b\u003e , which guarantees a runout of only \u003cb\u003e0.005mm TIR\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eIdeal for high-speed applications:\u003c\/b\u003e With a balance of \u003cb\u003eG2.5 at 20,000 rpm,\u003c\/b\u003e the chuck minimizes vibrations and ensures higher machining quality.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eHigh durability and surface quality:\u003c\/b\u003e Made of hardened alloy steel with a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . All critical surfaces are precision ground and smoothed.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eImproved efficiency and versatility:\u003c\/b\u003e The \u003cb\u003einternal spindle cooling function\u003c\/b\u003e increases performance. The chuck is suitable for \u003cb\u003edrilling, milling, and CNC spindles\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eComplete set with technical detail:\u003c\/b\u003e The chuck has an \u003cb\u003eM16 thread\u003c\/b\u003e for draw bolts and is supplied complete with a \u003cb\u003eunion nut\u003c\/b\u003e .\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003ca href=\"#table-of-contents\"\u003eBack to table of contents\u003c\/a\u003e \n\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv id=\"bt40-er16-100\" class=\"product-detail-block\"\u003e\n\n\u003ch2\u003e BT40-ER16-100 M12*1.75\u003c\/h2\u003e\n\n \u003cp\u003eThe \u003cb\u003eBoka BT40-ER16-100\u003c\/b\u003e chuck features extremely low runout of \u003cb\u003e0.005mm TIR\u003c\/b\u003e and high-precision \u003cb\u003eAT3 taper accuracy\u003c\/b\u003e . It is precision balanced to \u003cb\u003eG2.5 at 20,000 rpm\u003c\/b\u003e and features \u003cb\u003einternal spindle cooling\u003c\/b\u003e and a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . Complete with an \u003cb\u003eM12 thread\u003c\/b\u003e and a union nut, it is ready for use on \u003cb\u003emilling and drilling machines\u003c\/b\u003e .\u003c\/p\u003e\n\n\u003ch3\u003e Product details and benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eExtremely low runout:\u003c\/b\u003e The conical surface is ground for high \u003cb\u003eAT3 accuracy\u003c\/b\u003e , which guarantees a runout of only \u003cb\u003e0.005mm TIR\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eIdeal for high-speed applications:\u003c\/b\u003e With a balance of \u003cb\u003eG2.5 at 20,000 rpm,\u003c\/b\u003e the chuck minimizes vibrations and ensures higher machining quality.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eHigh durability and surface quality:\u003c\/b\u003e Made of hardened alloy steel with a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . All critical surfaces are precision ground and smoothed.\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cb\u003eImproved efficiency and versatility:\u003c\/b\u003e The \u003cb\u003einternal spindle cooling function\u003c\/b\u003e increases performance. The chuck is suitable for \u003cb\u003edrilling, milling, and CNC spindles\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eComplete set with technical detail:\u003c\/b\u003e The chuck has an \u003cb\u003eM12 thread\u003c\/b\u003e for tension bolts and is supplied complete with a \u003cb\u003eunion nut\u003c\/b\u003e .\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003ca href=\"#table-of-contents\"\u003eBack to table of contents\u003c\/a\u003e \n\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv id=\"bt40-er25-100\" class=\"product-detail-block\"\u003e\n\n\u003ch2\u003e BT40-ER25-100 M12*1.75\u003c\/h2\u003e\n\n\u003cp\u003e The \u003cb\u003eBoka BT40-ER25-100\u003c\/b\u003e chuck features extremely low runout of \u003cb\u003e0.005mm TIR\u003c\/b\u003e and high-precision \u003cb\u003eAT3 taper accuracy\u003c\/b\u003e . It is precision balanced to \u003cb\u003eG2.5 at 20,000 rpm\u003c\/b\u003e and features \u003cb\u003einternal spindle cooling\u003c\/b\u003e and a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . Complete with an \u003cb\u003eM12 thread\u003c\/b\u003e and a union nut, it is ready for use on \u003cb\u003emilling and drilling machines\u003c\/b\u003e .\u003c\/p\u003e\n\n\u003ch3\u003e Product details and benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e \n\u003cb\u003eExtremely low runout:\u003c\/b\u003e The conical surface is ground for high \u003cb\u003eAT3 accuracy\u003c\/b\u003e , which guarantees a runout of only \u003cb\u003e0.005mm TIR\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eIdeal for high-speed applications:\u003c\/b\u003e With a balance of \u003cb\u003eG2.5 at 20,000 rpm,\u003c\/b\u003e the chuck minimizes vibrations and ensures higher machining quality.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eHigh durability and surface quality:\u003c\/b\u003e Made of hardened alloy steel with a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . All critical surfaces are precision ground and smoothed.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eImproved efficiency and versatility:\u003c\/b\u003e The \u003cb\u003einternal spindle cooling function\u003c\/b\u003e increases performance. The chuck is suitable for \u003cb\u003edrilling, milling, and CNC spindles\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eComplete set with technical detail:\u003c\/b\u003e The chuck has an \u003cb\u003eM12 thread\u003c\/b\u003e for tension bolts and is supplied complete with a \u003cb\u003eunion nut\u003c\/b\u003e .\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003ca href=\"#table-of-contents\"\u003eBack to table of contents\u003c\/a\u003e \n\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv id=\"bt40-er20-100\" class=\"product-detail-block\"\u003e\n\n\u003ch2\u003e BT40-ER20-100 M12*1.75\u003c\/h2\u003e\n\n \u003cp\u003eThe \u003cb\u003eBoka BT40-ER20-100\u003c\/b\u003e chuck features extremely low runout of \u003cb\u003e0.005mm TIR\u003c\/b\u003e and high-precision \u003cb\u003eAT3 taper accuracy\u003c\/b\u003e . It is precision balanced to \u003cb\u003eG2.5 at 20,000 rpm\u003c\/b\u003e and features \u003cb\u003einternal spindle cooling\u003c\/b\u003e and a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . Complete with an \u003cb\u003eM12 thread\u003c\/b\u003e and a retaining nut, it is ready for use on \u003cb\u003emilling and drilling machines\u003c\/b\u003e .\u003c\/p\u003e\n\n\u003ch3\u003e Product details and benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eExtremely low runout:\u003c\/b\u003e The conical surface is ground for high \u003cb\u003eAT3 accuracy\u003c\/b\u003e , which guarantees a runout of only \u003cb\u003e0.005mm TIR\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eIdeal for high-speed applications:\u003c\/b\u003e With a balance of \u003cb\u003eG2.5 at 20,000 rpm,\u003c\/b\u003e the chuck minimizes vibrations and ensures higher machining quality.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eHigh durability and surface quality:\u003c\/b\u003e Made of hardened alloy steel with a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . All critical surfaces are precision ground and smoothed.\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cb\u003eImproved efficiency and versatility:\u003c\/b\u003e The \u003cb\u003einternal spindle cooling function\u003c\/b\u003e increases performance. The chuck is suitable for \u003cb\u003edrilling, milling, and CNC spindles\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eComplete set with technical detail:\u003c\/b\u003e The chuck has an \u003cb\u003eM12 thread\u003c\/b\u003e for tension bolts and is supplied complete with a \u003cb\u003eunion nut\u003c\/b\u003e .\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003ca href=\"#table-of-contents\"\u003eBack to table of contents\u003c\/a\u003e \n\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv id=\"bt40-er32-100\" class=\"product-detail-block\"\u003e\n\n\u003ch2\u003e BT40-ER32-100 M12*1.75\u003c\/h2\u003e\n\n\u003cp\u003e The \u003cb\u003eBoka BT40-ER32-100\u003c\/b\u003e chuck features extremely low runout of \u003cb\u003e0.005mm TIR\u003c\/b\u003e and high-precision \u003cb\u003eAT3 taper accuracy\u003c\/b\u003e . It is precision balanced to \u003cb\u003eG2.5 at 20,000 rpm\u003c\/b\u003e and features \u003cb\u003einternal spindle cooling\u003c\/b\u003e and a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . Complete with an \u003cb\u003eM12 thread\u003c\/b\u003e and a union nut, it is ready for use on \u003cb\u003emilling and drilling machines\u003c\/b\u003e .\u003c\/p\u003e\n\n\u003ch3\u003e Product details and benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e \n\u003cb\u003eExtremely low runout:\u003c\/b\u003e The conical surface is ground for high \u003cb\u003eAT3 accuracy\u003c\/b\u003e , which guarantees a runout of only \u003cb\u003e0.005mm TIR\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eIdeal for high-speed applications:\u003c\/b\u003e With a balance of \u003cb\u003eG2.5 at 20,000 rpm,\u003c\/b\u003e the chuck minimizes vibrations and ensures higher machining quality.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eHigh durability and surface quality:\u003c\/b\u003e Made of hardened alloy steel with a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . All critical surfaces are precision ground and smoothed.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eImproved efficiency and versatility:\u003c\/b\u003e The \u003cb\u003einternal spindle cooling function\u003c\/b\u003e increases performance. The chuck is suitable for \u003cb\u003edrilling, milling, and CNC spindles\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eComplete set with technical detail:\u003c\/b\u003e The chuck has an \u003cb\u003eM12 thread\u003c\/b\u003e for tension bolts and is supplied complete with a \u003cb\u003eunion nut\u003c\/b\u003e .\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003ca href=\"#table-of-contents\"\u003eBack to table of contents\u003c\/a\u003e \n\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv id=\"bt40-er40-100\" class=\"product-detail-block\"\u003e\n\n\u003ch2\u003e BT40-ER40-100 M12*1.75\u003c\/h2\u003e\n\n \u003cp\u003eThe \u003cb\u003eBoka BT40-ER40-100\u003c\/b\u003e chuck features extremely low runout of \u003cb\u003e0.005mm TIR\u003c\/b\u003e and high-precision \u003cb\u003eAT3 taper accuracy\u003c\/b\u003e . It is precision balanced to \u003cb\u003eG2.5 at 20,000 rpm\u003c\/b\u003e and features \u003cb\u003einternal spindle cooling\u003c\/b\u003e and a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . Complete with an \u003cb\u003eM12 thread\u003c\/b\u003e and a union nut, it is ready for use on \u003cb\u003emilling and drilling machines\u003c\/b\u003e .\u003c\/p\u003e\n\n\u003ch3\u003e Product details and benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eExtremely low runout:\u003c\/b\u003e The conical surface is ground for high \u003cb\u003eAT3 accuracy\u003c\/b\u003e , which guarantees a runout of only \u003cb\u003e0.005mm TIR\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eIdeal for high-speed applications:\u003c\/b\u003e With a balance of \u003cb\u003eG2.5 at 20,000 rpm,\u003c\/b\u003e the chuck minimizes vibrations and ensures higher machining quality.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eHigh durability and surface quality:\u003c\/b\u003e Made of hardened alloy steel with a hardness of \u003cb\u003eHRC48-52\u003c\/b\u003e . All critical surfaces are precision ground and smoothed.\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cb\u003eImproved efficiency and versatility:\u003c\/b\u003e The \u003cb\u003einternal spindle cooling function\u003c\/b\u003e increases performance. The chuck is suitable for \u003cb\u003edrilling, milling, and CNC spindles\u003c\/b\u003e .\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cb\u003eComplete set with technical detail:\u003c\/b\u003e The chuck has an \u003cb\u003eM12 thread\u003c\/b\u003e for tension bolts and is supplied complete with a \u003cb\u003eunion nut\u003c\/b\u003e .\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003ca href=\"#table-of-contents\"\u003eBack to table of contents\u003c\/a\u003e\n\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv id=\"specifications\" class=\"specifications-block\"\u003e\n\n\u003ch3\u003e Specifications \u003c\/h3\u003e\n\n\u003cp\u003e\u003cimg style=\"max-width:1000px;width:100%;height:auto\" alt=\"BT-ER collet chuck specifications\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0505\/9503\/7346\/files\/BT-ER-Collect-Chunk_para.png\"\u003e\u003c\/p\u003e\n\n\u003cdiv class=\"table-wrapper\"\u003e\u003ctable\u003e\n\n\u003cthead\u003e\u003ctr\u003e\n\n\u003cth\u003e SKU\u003c\/th\u003e\n\n\u003cth\u003e Type\u003c\/th\u003e\n\n\u003cth\u003e Model\u003c\/th\u003e\n\n\u003cth\u003e L1\u003c\/th\u003e\n\n\u003cth\u003e L\u003c\/th\u003e\n\n\u003cth\u003e d\u003c\/th\u003e\n\n\u003cth\u003e D\u003c\/th\u003e\n\n\u003cth\u003e M\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031501\u003c\/td\u003e\n\n\u003ctd\u003e BT40-ER16-70\u003c\/td\u003e\n\n\u003ctd\u003e M12*1.75\u003c\/td\u003e\n\n\u003ctd\u003e 70\u003c\/td\u003e\n\n\u003ctd\u003e 135.4\u003c\/td\u003e\n\n\u003ctd\u003e 16\u003c\/td\u003e\n\n\u003ctd\u003e 28\u003c\/td\u003e\n\n\u003ctd\u003e M16\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031505\u003c\/td\u003e\n\n\u003ctd\u003e BT40-ER16-100\u003c\/td\u003e\n\n\u003ctd\u003e M12*1.75\u003c\/td\u003e\n\n\u003ctd\u003e 100\u003c\/td\u003e\n\n\u003ctd\u003e 165.4\u003c\/td\u003e\n\n\u003ctd\u003e 16\u003c\/td\u003e\n\n\u003ctd\u003e 28\u003c\/td\u003e\n\n\u003ctd\u003e M16\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031507\u003c\/td\u003e\n\n\u003ctd\u003e BT40-ER20-100\u003c\/td\u003e\n\n\u003ctd\u003e M12*1.75\u003c\/td\u003e\n\n\u003ctd\u003e 100\u003c\/td\u003e\n\n\u003ctd\u003e 165.4\u003c\/td\u003e\n\n\u003ctd\u003e 20\u003c\/td\u003e\n\n\u003ctd\u003e 34\u003c\/td\u003e\n\n\u003ctd\u003e M16\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031506\u003c\/td\u003e\n\n\u003ctd\u003e BT40-ER20-150\u003c\/td\u003e\n\n\u003ctd\u003e M16*2.0\u003c\/td\u003e\n\n\u003ctd\u003e 150\u003c\/td\u003e\n\n\u003ctd\u003e 215.4\u003c\/td\u003e\n\n\u003ctd\u003e 20\u003c\/td\u003e\n\n\u003ctd\u003e 34\u003c\/td\u003e\n\n\u003ctd\u003e M16\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031502\u003c\/td\u003e\n\n\u003ctd\u003e BT40-ER25-70\u003c\/td\u003e\n\n\u003ctd\u003e M12*1.75\u003c\/td\u003e\n\n\u003ctd\u003e 70\u003c\/td\u003e\n\n\u003ctd\u003e 135.4\u003c\/td\u003e\n\n\u003ctd\u003e 25\u003c\/td\u003e\n\n\u003ctd\u003e 42\u003c\/td\u003e\n\n\u003ctd\u003e M16\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031503\u003c\/td\u003e\n\n\u003ctd\u003e BT40-ER32-70\u003c\/td\u003e\n\n\u003ctd\u003e M12*1.75\u003c\/td\u003e\n\n\u003ctd\u003e 70\u003c\/td\u003e\n\n\u003ctd\u003e 135.4\u003c\/td\u003e\n\n\u003ctd\u003e 32\u003c\/td\u003e\n\n\u003ctd\u003e 50\u003c\/td\u003e\n\n\u003ctd\u003e M16\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031508\u003c\/td\u003e\n\n\u003ctd\u003e BT40-ER32-100\u003c\/td\u003e\n\n\u003ctd\u003e M12*1.75\u003c\/td\u003e\n\n\u003ctd\u003e 100\u003c\/td\u003e\n\n\u003ctd\u003e 165.4\u003c\/td\u003e\n\n\u003ctd\u003e 32\u003c\/td\u003e\n\n\u003ctd\u003e 50\u003c\/td\u003e\n\n\u003ctd\u003e M16\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031504\u003c\/td\u003e\n\n\u003ctd\u003e BT40-ER40-80\u003c\/td\u003e\n\n\u003ctd\u003e M12*1.75\u003c\/td\u003e\n\n\u003ctd\u003e 80\u003c\/td\u003e\n\n\u003ctd\u003e 145.4\u003c\/td\u003e\n\n\u003ctd\u003e 40\u003c\/td\u003e\n\n\u003ctd\u003e 63\u003c\/td\u003e\n\n\u003ctd\u003e M16\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031509\u003c\/td\u003e\n\n\u003ctd\u003e BT40-ER40-100\u003c\/td\u003e\n\n\u003ctd\u003e M12*1.75\u003c\/td\u003e\n\n\u003ctd\u003e 100\u003c\/td\u003e\n\n\u003ctd\u003e 165.4\u003c\/td\u003e\n\n\u003ctd\u003e 40\u003c\/td\u003e\n\n\u003ctd\u003e 63\u003c\/td\u003e\n\n\u003ctd\u003e M16\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003ch3\u003e Weight and dimensions\u003c\/h3\u003e\n\n\u003cdiv class=\"table-wrapper\"\u003e\u003ctable\u003e\n\n\u003cthead\u003e\u003ctr\u003e\n\n\u003cth\u003e SKU\u003c\/th\u003e\n\n\u003cth\u003e Weight (kg)\u003c\/th\u003e\n\n\u003cth\u003e Dimensions (mm)\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031501\u003c\/td\u003e\n\n\u003ctd\u003e 1.15\u003c\/td\u003e\n\n\u003ctd\u003e 72*72*150\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031502\u003c\/td\u003e\n\n\u003ctd\u003e 1.25\u003c\/td\u003e\n\n\u003ctd\u003e 72*72*150\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031503\u003c\/td\u003e\n\n\u003ctd\u003e 1.3\u003c\/td\u003e\n\n\u003ctd\u003e 72*72*150\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031504\u003c\/td\u003e\n\n\u003ctd\u003e 1.5\u003c\/td\u003e\n\n\u003ctd\u003e 72*72*150\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031505\u003c\/td\u003e\n\n\u003ctd\u003e 1.25\u003c\/td\u003e\n\n\u003ctd\u003e 72*72*180\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031506\u003c\/td\u003e\n\n\u003ctd\u003e 1.4\u003c\/td\u003e\n\n\u003ctd\u003e 72*72*180\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n \u003ctd\u003e56031507\u003c\/td\u003e\n\n\u003ctd\u003e 1.4\u003c\/td\u003e\n\n\u003ctd\u003e 72*72*180\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031508\u003c\/td\u003e\n\n\u003ctd\u003e 1.7\u003c\/td\u003e\n\n\u003ctd\u003e 72*72*180\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e 56031509\u003c\/td\u003e\n\n\u003ctd\u003e 2.05\u003c\/td\u003e\n\n\u003ctd\u003e 72*72*180 \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cstyle\u003ebody{font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;line-height:1.6;padding:0;color:#333;background-color:#ffffff;font-size:16px}.product-container{max-width:900px;margin:0 auto;padding:24px;background-color:#ffffff;border-radius:12px}h1,h2,h3{color:#333;font-weight:600}h1{font-size:28px;border-bottom:2px solid #e0e0e0;padding-bottom:15px;margin-bottom:20px}h2{font-size:22px;margin-top:36px}h3{font-size:18px;margin-top:24px}a{text-decoration:none;transition:color .3s ease}a:hover{text-decoration:underline}.product-navigation a{color:#007bff}.product-navigation a:hover{color:#0056b3}hr{border:0;height:1px;background-color:#e0e0e0;margin:36px 0}img{max-width:100%;height:auto;border-radius:8px;box-shadow:0 3px 6px rgba(0,0,0,.1);margin:20px 0}.product-detail-block{padding:20px;background-color:#f7f7f7;border-radius:10px;margin-bottom:30px;border:none}.table-of-contents{background-color:#f7f7f7;border:1px solid #e0e0e0;border-radius:8px;padding:20px;margin-bottom:30px}.table-of-contents h2{margin:0;font-size:20px}.table-of-contents a{color:#007bff;font-weight:600;font-size:16px;display:block;padding:5px 10px;border-radius:5px;transition:background-color .2s ease,color .2s ease}.table-of-contents a:hover{background-color:#e0e0e0;color:#0056b3;text-decoration:underline}.table-wrapper{overflow-x:auto;margin:20px 0;border-radius:10px;box-shadow:0 2px 8px rgba(0,0,0,.1);border:1px solid #e0e0e0}table{width:100%;border-collapse:collapse;border-spacing:0;background-color:#fff}th,td{padding:12px 15px;border:1px solid #e0e0e0;text-align:center}td{font-size:15px}th{background-color:#f5f5f5;font-weight:bold;color:#333}tr:nth-child(even) td{background-color:#fafafa}th:first-child,td:first-child{position:sticky;left:0;background-color:#f5f5f5;box-shadow:1px 0 0 0 #e0e0e0;font-weight:bold;min-width:140px;font-size:16px}tr:nth-child(even) td:first-child{background-color:#eee}@media (max-width:768px){body{font-size:14px}.product-container{padding:0;margin:0}.product-header,.product-detail-block,.table-of-contents{padding-left:16px;padding-right:16px}.table-of-contents a{font-size:14px}h1{font-size:24px;padding-bottom:10px}h2{font-size:20px;margin-top:28px}h3{font-size:16px;margin-top:20px}th,td{padding:8px 10px;font-size:13px}th:first-child,td:first-child{min-width:100px}}.toc-checkbox{display:none}.toc-title{cursor:pointer;display:flex;align-items:center;justify-content:space-between;padding-bottom:10px;border-bottom:1px solid #e0e0e0;margin-bottom:0}.toc-title::after{content:'▼';font-size:14px;color:#555;transition:transform .3s ease}#toc-toggle:checked+.toc-title::after{transform:rotate(0deg)}#toc-toggle:not(:checked)+.toc-title::after{transform:rotate(-90deg)}.toc-content{max-height:500px;overflow:hidden;transition:max-height .4s ease-in-out}#toc-toggle:not(:checked)~.toc-content{max-height:0;padding-top:0;margin-top:0}.view-specs-link{color:#007bff;font-size:16px}.view-specs-link:hover{text-decoration:underline}\u003c\/style\u003e","brand":"GEM Maschinen","offers":[{"title":"BT40-ER16-70","offer_id":52454519210324,"sku":"56031501","price":52.44,"currency_code":"EUR","in_stock":true},{"title":"BT40-ER25-70","offer_id":52454519243092,"sku":"56031502","price":52.44,"currency_code":"EUR","in_stock":true},{"title":"BT40-ER32-70","offer_id":52454519275860,"sku":"56031503","price":52.44,"currency_code":"EUR","in_stock":true},{"title":"BT40-ER40-80","offer_id":52454519308628,"sku":"56031504","price":52.44,"currency_code":"EUR","in_stock":true},{"title":"BT40-ER16-100","offer_id":52454519341396,"sku":"56031505","price":56.47,"currency_code":"EUR","in_stock":true},{"title":"BT40-ER25-100","offer_id":52454519374164,"sku":"56031506","price":56.47,"currency_code":"EUR","in_stock":true},{"title":"BT40-ER20-100","offer_id":52454519406932,"sku":"56031507","price":56.47,"currency_code":"EUR","in_stock":true},{"title":"BT40-ER32-100","offer_id":52454765199700,"sku":"56031508","price":56.47,"currency_code":"EUR","in_stock":true},{"title":"BT40-ER40-100","offer_id":52454765232468,"sku":"56031509","price":56.47,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0505\/9503\/7346\/files\/BT40-ER16-70-1.jpg?v=1755328130","url":"https:\/\/gem-europe.myshopify.com\/products\/boka-bt40-er-spannzangenfutter-mit-0-005mm-rundlauf-und-g2-5-wuchtung","provider":"GEM Maschinen GmbH","version":"1.0","type":"link"}