The DURO-M is a manually operated lathe chuck with a plain spiral and through hole. It is primarily used on conventional lathes for the machining of turned parts.

Technical Features:

• Chuck body (as well as all other components) made of steel
• Centric clamping via plain spiral
• Plain spiral forged in die and highly tempered, thread flanks ground on both sides
• Jaws ground for concentricity in the chuck
• Factory-determined zero play as precision play

The maximum permissible speed is set so that at maximum clamping force and when using the heaviest associated jaws, one third of the clamping force remains available as residual clamping force. The jaws must not extend beyond the outer diameter of the chuck. The chucks must be in perfect condition. Furthermore, the regulations according to DIN 6386 Part 1 apply.

Clamping force according to DIN 6350: The clamping force is the sum of all jaw forces acting radially on the workpiece when stationary. The specified clamping forces are guideline values. They apply to chucks in perfect condition, lubricated with Röhm grease F80.

Scope of delivery: Chuck, chuck key, jaws

Application area:
Conventional clamping horizontal and vertical lathes as well as milling machines, rotary tables, and dividing heads. Primarily used in single or small batch production or repair workshops. Clamping of rotationally symmetrical parts for turning and milling operations.

Advantages:

• Jaws are generally blued
• Minimal interference contour
• High force transmission
• Drip edge for coolant

Jaw length (mm): 95
Mounting short taper: 6
Number of jaws: 4
Manufacturer: RÖHM
Through hole (mm): 76
Max speed (r/min): 3000
Torque (N·m): 150
Mounting (mm): 106.4
Clamping force (kN): 63
Type: 250/4
Height (mm): 83
Quantity (ST): 1.