250mm Bison 6 Jaw Precision Scroll Chuck 2 Piece Jaws

250mm Bison 6 Jaw Precision Scroll Chuck Type 3865

Steel body material provides higher rigidity and wear resistance, enabling the chuck to withstand higher machining forces.

Hardened and ground working surfaces prolong life while ensuring continuous accuracy and repeatability.

Balanced scroll plate allows higher rotation speeds without excess vibration.

Repeatability: 0.015mm.

Superior accuracy: small screws on the outside enable the chuck to be adjusted to position with nearly zero run-out (adjusting accuracy within 0.005 mm).

The clamped workpiece is adjusted to the required concentricity by means of 4 (8 for sizes 400 mm, 500 mm, 630 mm) radially arranged adjusting screws.

This precision chuck, with increased gripping accuracy, is made for universal use, but particularly advantageous for grinding machines, indexing heads and lathes.

Mounted on the machine tool spindle from the back of the chuck by using an adapter plate.

Chucks are supplied with one set of hard base jaws and one set of hard top jaws.

Specifications

Bore = 76mm

Recess = 145mm

Mounting = 3 x M12 on 224mm P.C.D.

Front mount

Accuracy Adjustable to 0.005mm T.I.R.

Please click here for range of fully machined range of backplates will fit these chucks.

Part Number 3865-250

For full specifications please click here

Scroll Chucks