|Mfg SKU #||202-1495G|
|Tool Holder Category||Collet Chuck|
|max rpm balanced to||G2.5 20000|
|drawbar thread size||5/8x11UNC|
|Stop Screw Thread Size||M24 x 1.5|
|Dual Contact Tool Holder||No|
|collet chuck style||super rigid stub|
|collet nut diameter||1.42|
When you aspire to create one of the most competitive tool holders on the market, the details count. We invest heavily in extensive automation manufacturing and top of the line Mazak and grinding machines while pouring our heart and soul into bringing the tool to life. While not satisfied with just being good, so through customer data and rigorous testing, our R&D team are able to blend over 40 years of manufacturing know-how and real-world feedback to improve the tool holder's design and performance.
We optimize our process for both efficiency and accuracy by utilizing Kawasaki robotic arms to load and unload bar stock into the Mazak multi-tasking machine centers. We use SCM420 alloy steel to lay the foundation and case harden to RC 57-59 with a core of RC 34-39 to provide good core strength and maximize wear life. The core creates a dampening effect which reduces vibration in high speed milling to improve surface finish. The AT3 or better taper accuracy ensures 80% or better taper contact with spindle and using Stotz Air/Electronic Gaging for inspection on the taper. We precision grind the internal bore surface to <.0002" TIR and all bores are ground on a CNC grinder to ensure close run-out tolerance and evenly contact between the collet and the bore pocket. We use Haimer laser balancing machines to deliver a tool that can operate flawlessly at 20000 RPM and Mitutoyo or Mahr indicators to check the run out.
Made from SUJ2 alloy steel from Japan which is equivalent to AISI 52100 and hardened to HRC 46-48
Inside bore are precision turned to engage a better contact with retention knob's pilot to increase rigidity
Internal ring of the ER collet nut is precision ground on a CNC grinder to give optimal contact with the ER collet
0.0780" - 0.7870"
G2.5 25,000 RPM
Tool holder is balanced to G2.5 20,000 RPM on a HAIMER Tool Dynamic Balancing System from Germany. Balanced tool holder minimizes the centrifugal forces which minimize the stress on spindle bearing, minimize vibration and maximize the cutting tool's life cycle and greatly improve surface finish.
By utilizing the state of the art Okamoto ID CNC grinder to precision grind the internal bore, the runout tolerance is very stable in batch production. Runout is carefully inspected to ensure within 3 micron (0.0001") from taper to ER collet pocket.
To achieve AT3 or better taper contact as an industry standard, our taper surface are precision ground on Shigiya CNC grinder from Japan. We are not satisfied with just meeting the industry standard, the surface roughness on the taper is maintained to mirror finish.
The maximum torque is laser marked on the ER collet nut face to take the guess game out of the way to ensure proper amount of force should be applied while tightening. 8 Degree SK collet seats deeper in the pocket than 16 degree taper ER collet, providing twice more clamping force and twice more accuracy during high speed machining. Collet edge seats flush with the front surface of collet nut to maintain strong rigidity.
Each collet is inspected 3 times at 0, 120, and 240 degree at 4 times diameter to guarantee the 5 micron (0.000197") runout tolerance. This inspection process is also repeated 3 times with fully disassemble collet from the collet nut and the tool holder to guarantee consistent runout tolerance