Description:
Stationary 3-jaw steel chuck for centric workpiece holding on drilling and milling machines.

Material:
Steel.

Version:
- Contact faces on base ground.
- Jaw plates hardened and ground.

Function / Note:
- Take note of the jaw numbers when mounting.
- Chuck is precision ground; W, X, Y and Z tolerances between the jaws are within 0.05 mm.
- Repeat accuracy with centric clamping and hard jaws is within 0.02 mm.
- Movable jaw bases are driven by the internal scroll plate.
- Rotation of the pinion transfers force through the scroll plate and produces synchronous inward or outward jaw movement.
- Regular lubrication is required; inadequate lubrication causes excessive wear and reduced clamping force.

Advantages:
- Centric-clamping repeat accuracy: 0.02 mm.
- Flat design.
- For drilling and milling machines.
- Precision-ground body.
- Optimum accessibility to the lubrication system.
- Wide chuck bore for holding bar material.
- Actuated using a hex key for quick and easy operation.
- Soft jaws can also be attached to the jaw bases.

Supplied With:
Tightening key.

Accessories:
Soft steel jaw set: K1838.3153.

Drawing Reference:
- 1) Reversible jaw.
- 2) Standard jaws.
- 3) Fastening screws.

Dimensions / Variant Data:
- D: 315 mm
- D1: 255 mm
- D2: 190 mm
- D3: 80 mm
- D4: 210 mm
- D5: M12
- B: 32 mm
- B1: 16 mm
- B2: 93 mm
- B3: 24.9 mm
- B4: 32.5 mm
- H: 73 mm
- H1: 20 mm
- H2: 52 mm
- H3: 6 mm
- H4: 12 mm
- H5: 12 mm
- SW: 12 mm
- Outer clamping range: 12-250 mm
- Inner clamping range: 72-240 mm
- Maximum tightening torque: 156 Nm
- Clamping force F: 36 kN