b'ER Collet Celebrates Golden AnniversaryThis year marks the 50th anniversarycollet. He added a groove to the outer of an invention that changed the wayside of the collet, which then was manufacturers hold cutting tools. Aninserted into the eccentric ring of a industry standard for decades, the ERnewly created clamping nut. With his collet is the most widely used clampingdesign, users could quickly and easily system in the world and still ispull the collet directly out of the holder produced at the Tenniken, Switzerland,after unscrewing the nut. Additionally, plant of Whitestown, Indiana-basedhis ER collet design incorporates more Rego-Fix Tool Corp. slits, facilitating a wider clamping Prior to the ER collet, the E collet wasrange of 0.5 mm to 1 mm (0.02" to the technical standard. Unfortunately,0.04") for increased versatility.though, after machining, those colletsOur fathers vision that the industry were anchored so firmly in their holderswould use millions of ER collets was that they scarcely could be removed,met with skepticism and disbelief according to the company. Shops wouldby many, said Vice President Stefan use wooden bars and rods to knockWeber, son of the founder. But collets through the lower part of thetoday, they are in use in thousands of holder with a hammer. This required a lotmachining centers worldwide.of force, damaged the rear sides of colletsIn 1992, the ER collet was declared and considerably shortened their serviceDIN standard 6499. Rego-Fix Toollives. For more information about Rego-In 1972, Rego-Fix Tool founderFix Tool, call 317-870-5959 or visit Fritz Weber and his team solved theseus.rego-fix.com. Rego-Fix Tool inventedproblems with the creation of the ER Rego-Fix Tool the ER collet 50 years ago.Clamp Down make that move from fear of work- factor that companies dont like, ers potentially burning their handsRaun said.because a shrink-fit holder mustIn addition, manufacturers must If you have to change 50 toolsbe heated to expand the bore sopurchase a shrink-fit holder ma-every day using that wrench byit can accept a tool shank, whichchine, which has an electric induc-hand, you will have forearms likethen is held rigidly after the holdertion heating coil.Popeye, Doiron said. I believe theis cooled rapidly. When a manufacturer decides FPC holders performance will pro- Sometimestheresasafetyagainst a shrink-fit system, Raun vide more tool life, reducing toolsaid a hydraulic holder provides a changes. sufficiently high level of accuracy contributors and clamping force but only for fin-Need for Speed ishing applications, as well as axi-When an application requiresEmuge-Franken USA al-type applications like drilling or a holder and tool assembly with800-323-3013 reaming.the least amount of TIR, especiallywww.emuge.com Youre not going to really be when running at a high spindleable to put a lot of side load or do a speed, Raun recommends shrink-fitIscar USA lot of heavy roughing with that type toolholders. 888-472-2788 of toolholder, he said. It has a ten-Theyre balanced for that pur- www.iscarmetals.com dency to flex internally because it pose, he said. If you can move tohas a bladder around the tool as far shrink, thats always the best-caseYG-1 Tool (USA) Co. as how hydro tools are designed.scenario. 800-765-8665 Pulvermacher agreed that hy-However, some shops hesitate towww.yg1usa.com draulicchucksfordrillinggive 34OCTOBER 2022 Toolholding.indd 34 9/19/22 11:14 AM'