High-precision power hollow chucks type – “PPM” Ø170-400

Chucks are designed for clamping workpieces machined on lathes of “B” accuracy class in producing multiple units.

A motorized drive mounted on a back spindle terminus of a machine starts a chuck.

Adjustment of a required clamping diameter is performed by remounting of hardened top jaws to base jaws riffling, in this case required chuck accuracy remains. A chuck is available with grease lubricators for lubricating working surfaces of a chuck. The advantage of a chuck is that it has a through-hole which allows machining workpieces bypassing them through the machine spindle. Chucks are interchangeable with the chucks produced by leading European manufacturers (SMW-AutoBlok, Schunk, etc ) and Asian manufacturers (KITAGAWA, AUTO Strong, etc).

Parameter name Chuck diameter, mm
170 210 250 315 400
 Through-hole mm 45 52 66 95 118
 Plunger stroke mm 14 17 21 21 27
 Jaw stroke mm 3,5 4,5 5,5 5,5 7
 Clamping surface diameters* mm 12-210 14-235 20-275 40-350 52-450
 Max draw pull transmitted by a drive kN 25 38 50 60 70
 Max gripping force of top jaws  kN 60 100 120 150 190
 Admissible rotating speed of a chuck min-1 6000 5000 4000 3200 2500
 Weight*, not more than kg 14 22 34 45 90

*Diameter range of the surface clamped by jaws (come with the equipment); Chuck weight including hardened top jaws.

Ordering example: a power hollow chuck, outer diameter 210 мм, through-hole 52 mm with adapting flange (mounting type A6) and jaws serration pitch 1/16’’х90°: PPM-210.52D/А6.

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