|Mfg SKU #||202-7673|
|Tool Holder Category||Collet Chuck|
|max rpm balanced to||G2.5 20000|
|drawbar thread size||M12x1.75|
|Stop Screw Thread Size||M11 x 1.0|
|Dual Contact Tool Holder||Yes|
|collet nut diameter||1.09|
- Seating deeper into the pocket and smaller overhand creates greater accuracy- High gripping torque due to 8 degree taper- SK collet is pushed into the pocket without twisting by a flat shoulder, thus force is perpendicular to the centerline of the tool holder for strong gripping- Rigid collet body is flush with nut to maintain rigidity- Shoulder Collet edge seats flush with the front surface of collet nut to maintain strong rigidity- Shoulder on the front of the collet prevents chip packing or stringy bird nests below the collet chuck nut of extend tooling life
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.
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
Slot is milled out around the SK collet nut to ensure compatibility with standard ER collet wrench
0.069" - 0.393"
G2.5 20,000 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