ROEMHELD Hinge Clamps – Top Flange, B1.8251

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ROEMHELD Hinge Clamps – Top Flange, B1.8251

3600 psi max

Double Acting

Hinge Clamps have a sturdy linkage configuration that moves the clamping arm forward as it pivots into clamping position. This specially designed linkage allows the clamp to exert nearly perfectly vertical clamping force. The clamping arm retracts fully for clear loading from above. Ideal for clamping in narrow recesses. Durable, economical clamp with an easy-to-clean mechanism and standard metallic wiper. The top-flange version shown here is designed specifically for space-saving manifold mounting.

Available in four clamp sizes, double acting only, each with either a standard clamping arm with swivel contact bolt, a long clamping arm for customization, or without a clamping arm for a user-manufactured arm. Clamping force at 3600 psi with standard clamping arm:

850 Lbs

2200 Lbs

3200 Lbs

4800 Lbs

Documents

Data Sheet B18251

B18251

Clamping Action

Applying fluid pressure to the A (clamping) port advances the piston, which is connected to the clamping arm. The arm moves forward as it pivots into position via a linkage. Switching pressure to the B (unclamping) port positively retracts the piston and the attached clamping arm.

Design Considerations

The ideal clamping height in most cases is "H", because arm motion is totally vertical at that height. This avoids applying any horizontal force to the workpiece during clamping.

Mounting & Fluid Supply

For low mounting, install cylindrical base in a bored hole, then fasten top flange with four socket-head cap screws. For high mounting, use optional intermediate plate with four longer socket-head cap screws.

Version 1:

Two 1/8" BSPP or 1/4" BSPP ports, A for clamping, B for unclamping. For optional manifold mounting, use the A and B manifold ports underneath the clamp by unscrewing the sealing plugs and installing two CLR-9210-145-F Connecting Inserts (also install two CLR-901-F Port Plugs in the 1/4" BSPP ports). Do not use NPT fittings.

Version 2:

Two 1/8" BSPP or 1/4" BSPP ports, A for clamping, B for unclamping – on any of three sides. Do not use NPT fittings.

Optional Position Sensing

These clamps can be ordered with an extended piston rod for inductive or pneumatic position monitoring. For inductive postion monitoring, order an inductive monitoring end cap (separately or already installed), two CLR-3829-198-PM inductive proximity switches, and two CLR-3829-099-PM right-angle push plugs with cable. For pneumatic position monitoring, order a pneumatic monitoring end cap (separately or already installed). Monitoring devices can be turned to any of the four sides.

Material

MATERIAL	HEAT TREAT	FINISH	DFARS	RoHS
Steel	-	-	✔	✔

Click here for detailed material and finish specifications.

California residents click here for Prop 65 information.

ROEMHELD Hinge Clamps – Top Flange, B1.8251

B1.8251 Hinge Clamp Chart - Arms Sold Separately

PART NO.	CLAMP SIZE	MAX CLAMPING FORCE (kN) with Standard Clamp Arm	a (mm)	a1 (mm)	b (mm)	b1 (mm)	d1 (mm)	f1 (mm)	g2 (mm)	h (mm)	WEIGHT (lbs)
CLR-1825-130	1	3.8	55	42	55	42	23.5	32	29.8	64	1.96 LBS
CLR-1825-230	2	9.7	70	56	70	56	33	43	41.8	92.5	4.85 LBS
CLR-1825-330	3	14.4	85	69	85	69	37	44.5	51.8	113	6.61 LBS
CLR-1825-430	4	21.5	100	81	100	81	43.5	52.5	64.8	128	13.66 LBS

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B1.8251 Standard Arms Chart

PART NO.	CLAMP SIZE	b2 (mm)	d1 (mm)	d2 (mm)	q2 (mm)	q3 (mm)	q4 (mm)	WEIGHT (LBS)
CLR-3548-510	1	15	23.5	29	12.5	25	M8	.42 LBS
CLR-3548-556	2	20	33	39.5	20	40	M12	1.12 LBS
CLR-3548-587	3	25	37	49	25	50	M16	1.97 LBS
CLR-3548-1035	4	30	43.5	60.5	28	55	M16	3.19 LBS

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B1.8251 Long Arm Chart

*Longer special clamping levers have a higher weight. Therefore, the flow rate must be considerably reduced to avoid damage to the mechanics in the stroke end positions. A flow rate throttling always must be affected in the supply line to the hinge clamp.

PART NO.	CLAMP SIZE	b2 (mm)	d1 (mm)	d3 (mm)	q3 (mm)	WEIGHT (LBS)
CLR-3548-511	1	15	23.5	59.5	25	.42 LBS
CLR-3548-557	2	20	33	81.5	40	1.12 LBS
CLR-3548-588	3	25	37	98	50	1.97 LBS
CLR-3548-1036	4	30	43.5	114	55	3.19 LBS

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B1.8251 Hinge Clamp Accessories Chart

Accessories	Size 1	Size 2	Size 3	Size 4
Swivel Contact Bolt	CLR-3614-298	CLR-3614-310	CLR-3614-315	CLR-3614-315
Jam nut	CLR-3300-111	CLR-3300-113	CLR-3300-114	CLR-3300-114
Intermediate plate	CLR-3456-449	CLR-3456-468	CLR-3456-489	CLR-3456-534
Plug-type connector	CLR-9210-145	CLR-9210-145	CLR-9210-145	CLR-9210-132
Screw plug with Internal hex	CLR-3610-047-F	CLR-3610-047-F	CLR-3300-821-F	CLR-3300-821-F
Flush Screw Plug with internal hex	CLR-0361-986-F	CLR-0361-986-F	CLR-0361-987-F	CLR-0361-987-F