Hi-Force HHR Double Acting Hollow Piston Hydraulic Cylinders

This double acting hollow piston cylinder range incorporates all of the design features of the single (acting) range with the added benefit of double acting design, which greatly enhances speed of operation and performance particularly in the longer length stroke options.

Additionally a substantial hydraulic pulling force is available in the piston retraction mode of operation. Standard range models are featured in this catalogue, however other stroke and tonnage options are available on request.

• Capacities from 33 to 247 tonnes.
• Stroke lengths from 51 to 305mm.
• Working pressure 700 Bar.
• Double acting design (hydraulic return).
• Stroke limiting device: Stop ring.
• Nitrocarburised piston rod.
• Annular area overload protection valve.
• Low friction bearing surfaces.
• Anti-extrusion seals.
• Collar thread protector supplied as standard.
• Click for Hydraulic Pumps, 700 Bar.

Dimensions and Specifications

Capacity
Push (t)	Pull (t)	Stroke (mm)	Oil Cap cm³	Cyl. Eff. Area cm²	A (mm)	B (mm)	C (mm)	D (mm)	E	F (mm)	G (mm)	H (mm)	I (mm)	J (mm)	Weight (kg)
33*	24	51	238	46.7	180	115	60.3	35	4 1/2”-12 UNC	40	M8	92	28	119	12.2
33*	24	150	701	46.7	279	115	60.3	35	4 1/2”-12 UNC	40	M8	92	28	218	17.6
33*	24	305	1424	46.7	434	115	60.3	35	4 1/2”-12 UNC	40	M8	92	28	373	25.7
61*	38	76	652	85.7	239	160	92	55	6 1/4”-12 UNC	45	M12	130	31	166	30.6
61*	38	152	1304	85.7	315	160	92	55	6 1/4”-12 UNC	45	M12	130	31	242	41.6
61*	38	254	2179	85.7	417	160	92	55	6 1/4”-12 UNC	45	M12	130	31	344	52.5
102	43	76	1087	143.1	310	213	140	80	8 3/4”-12 UNC	40	M16	178	82	234	68.5
102	43	152	2174	143.1	386	213	140	80	8 3/4”-12 UNC	40	M16	178	82	310	90
152	71	203	4320	212.8	503	270	184	102	N/A	N/A	N/A	N/A	98	389	170
247	76	203	7039	346.5	505	350	254	150	N/A	N/A	N/A	N/A	98	389	269

*33t & 61t models feature 2 base mounting holes at 90 deg. from couper.

Hi-Force range

We offer the full extensive range of Hi-Force hydraulic cylinders which includes a wide choice of options related to capacity, stroke length, single or double acting operation, steel or aluminium construction, hollow piston centre hole and mechanical failsafe lock ring designs. All models are 700 bar maximum working pressure and standard capacities range from 4.5 tonnes to 1012 tonnes. Hi-Force also offers custom designed and manufactured cylinders, meeting specific and unique customer requirements.

There is a Hi-Force hydraulic cylinder to suit every application and the high quality design and construction of all models, using the best available materials, ensures that Hi-Force hydraulic cylinders can cope with the most demanding applications in the harshest working conditions.