3 Jaw Power Chuck

3 Jaw Pull Compensating Power Chuck 3BD

Special fixture for shaft processing, the 3 jaw power chuck provide pull-back and compensation clamping functions for the workpiece (the chuck's clamping force provides torque and pull-back during machining).
This 3 jaw pull compensating power chuck ompensation amount for the center is 5mm and available for up to Ф10mm.
This 3 jaw power chuck used when the workpiece needs to be centered with the axis (tailstock positioning) and requires coaxiality with the shaft.
Flange connection for easy installation.

When a chuck without pull-back and compensation clamps a workpiece, the jaws may lift, pushing the shaft away from the center positioning. If the force from the tailstock cannot overcome this lifting force, it can result in the bending of the workpiece.

The tailstock only needs to support the workpiece, while the 3 jaw power chuck pulls the workpiece towards the center point, preventing any bending. This ensures excellent coaxiality of the machined shaft. When the outer diameter of the shaft is not coaxial with the center hole, the compensating function of the jaws becomes particularly effective.

Dimensions parameter

Spec	A	B	C (H6)	D	D1	D2	E	G	H	J	L	M	N	P	T
Model	A	B	C (H6)	D	D1	D2	E	G	H	J	L	M	N	P	T
3BD-06A5	168	116	140	104.8	82.56	24	15	4–20	38	50	52	M10×120	55	14	34
3BD-08A6	210	127	170	133.4	106.38	32	17	9–29	38	58	61	M12×125	67	20	41.5

Specifications parameter

Spec	Plunger stroke (mm)	Jaw stroke (Dia.) mm	Max. Pull force KN (kgf)	Max. Gripping force KN (kgf)	Max. Speed r/min	Gripping range (mm)	Corrected the amount mm (Dia.)	Moment of inertia kg·m²	Weight kg	Matching cylinder	Max. pressure MPa (kgf/cm²)
Model	Plunger stroke (mm)	Jaw stroke (Dia.) mm	Max. Pull force KN (kgf)	Max. Gripping force KN (kgf)	Max. Speed r/min	Gripping range (mm)	Corrected the amount mm (Dia.)	Moment of inertia kg·m²	Weight kg	Matching cylinder	Max. pressure MPa (kgf/cm²)
3BD-06A5	16	13	14.7 (1500)	25.0 (2550)	3500	6–35	5	0.2	13	SY-100	2.1 (21)
3BD-08A6	20	18	19.6 (2000)	34.3 (3500)	3000	16–65	6	0.5	22	SY-100	2.8 (28)

The 3BT-06 3 jaw power chuck’s center is spring type, when clamping, it’s based on the center, the workpiece could be pulled onto the position base, so as to make axial postion.