YG-1 WK102PE CAT40 20mm Bore 64.5mm Projection Hydraulic Chuck
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The YG-1 WK102PE is a new CAT40 taper hydraulic expansion chuck (Power E Hydro series) with a 20 mm bore diameter and 64.5 mm gauge-line projection, as encoded in the full part number CAT40AD/B-HC20P-64.5 visible on the factory labels in the photos. The hydraulic clamping mechanism uses oil-pressure expansion of a thin-walled steel sleeve to grip straight-shank tooling concentrically, delivering runout accuracy of ≤3 µm at 4× diameter overhang — ideal for high-speed finish milling, reaming, and drilling operations requiring superior balance and repeatability. The CAT40 (AD/B dual-contact) taper interfaces with standard V-flange spindles, and the chuck ships with a 5 mm × 100 mm T-handle hex wrench (visible in photo) for the hydraulic pressure screw. The body is through-coolant capable and ground to H6 bore tolerance; the included plastic storage/transport case protects the precision bore during handling and shipping.
Product Specifications
| Brand | YG-1 (YG Tooling) |
| MPN | WK102PE |
| Full Part Number | CAT40AD/B-HC20P-64.5 |
| Chuck Series | Power E Hydro |
| Taper / Shank Type | CAT40 (V-Flange, AD/B Dual Contact) |
| Bore Diameter | 20 mm |
| Bore Tolerance | H6 |
| Gauge-Line Projection (GL) | 64.5 mm |
| Clamping Method | Hydraulic expansion (oil-pressure thin-wall sleeve) |
| Runout Accuracy | ≤3 µm at 4× diameter overhang |
| Pressure Wrench Included | 5 mm × 100 mm T-handle hex key |
| Coolant | Through-coolant capable |
| Condition | New |