Berg Clamping systems Tool Clamping - HK / HKR

Application
Clamping sets of the type HKR are designed for clamping hollow shank tools according to DIN 69893.
Design features
HKR clamping sets have six collets held by an annular spring which allows a rocking movement for inserting and removing the hollow shank tools. During clamping the taper of the centrally positioned draw-bolt increases the actuation force, thereby generating a much higher clamping force at the collets. The special tribolic coating guarantees the highest possible constant clamping force. The clamping set is maintenance free. A locking bolt permits infinitely
variable positioning and fixation of the clamping set in the Z axis. No special tools are required for assembly and disassembly. The spindle has an easy to produce interior contour. The HKR-gripper has a built-in snap-hold feature allowing a toll to be hold securely in the spindel even in unclamped position.
Ordering example
HK 38
HKR 38
Delivery scope
Clamping set according to data sheet
Comments
When clamping without a tool the draw-bolt of the clamping set is supported at the end of the total stroke hT in the depth ‘m’ inside the spindle. If no possibility for the stop is provided at this point, it has to occur at a different point.

Gripper HKR

Type	d2	a	b	c	e	f	j	k	l	m	n	s	hT	hS	FB max kN	FH N	FS max kN	SW1	SW2	MA SW2
HKR 24	24	17	21,0	11	7,5	M 7 x 1	22,0	30	21,0	49	13,5	8,3	7,0	5,0	1,2	65	6	12	3	8
HKR 30	30	21	25,5	14	9	M 8 x 1	24,0	44	38,0	70	22,5	8,3	8,5	5,0	1,7	80	7	13	4	10
HKR 38	38	26	31,0	16	11	M 10 x 1	30,0	45	35,0	74	21,0	10,3	9,0	5,5	3,2	100	15	17	5	15
HKR 48	48	34	39,8	23	13	M 12 x 1	29,0	52	44,5	82	25,0	10,3	10,0	6,4	4,7	130	22	24	6	30
HKR 60	60	42	49,3	26	15	M 14 x 1,5	29,0	65	59,0	98	29,5	12,8	11,0	7,4	6,6	190	35	30	6	40
HKR 75	75	53	62,4	30	17	M 16 x 1,5	34,5	80	74,0	119	34,5	12,8	12,2	8,0	11,0	240	52	36	8	50