Hi-Force 'HFG' Single Acting Fail Safe Lock Ring Cylinders, from 50 to 1012 tonnes, Stroke Lengths 50 to 152mm

This single acting failsafe lock ring cylinder range combines all the versatility and efficiency of hydraulic power with the safety of mechanical load support. Ideally suited for applications requiring sustained load holding for extended periods, such as bridge support work.

Features a single acting, load return piston, threaded throughout its stroke length to suit the threaded mechanical load holding lock ring. Simply jack up the load, wind down the mechanical lock ring until it comes into contact with the cylinder body, release the hydraulic pressure and sustain the load mechanically.

All models are suitable for vertical lifting only and are supplied with tilting saddles as standard to reduce the risk of side loading the cylinder.

For easy rotation of the load holding locking ring, we recommend the purchase of tommy bar(s).

• Capacities from 50 to 1012 tonnes.
• Stroke lengths from 50 to 152mm.
• Working pressure 700 Bar.
• Single acting load return design.
• Nitrocarburised cylinder and piston rod for corrosion protection.
• Low friction bearing surfaces.
• Load / Gravity return.
• Stroke limiting device: Restriction port.
• Anti-extrusion seals.
• Tilting saddle fitted as standard.
• Other capacities and stroke lengths available on request.
• Click for Hydraulic Pumps, 700 Bar.

Dimensions and Specifications

Capacity (t)	Stroke (mm)	Oil cap. litres	Cyl. eff. area cm²	A (mm)	B (mm)	C (mm)	D (mm)	E (mm)	Weight (kg)
50	51	0.36	71.3	173	127	95	70	25	16.2
50	102	0.73	71.3	224	127	95	70	25	20.6
50	150	1.07	71.3	272	127	95	70	25	25
109	51	0.76	153.4	189	185	140	115	27.5	35
109	100	1.53	153.4	240	185	140	115	27.5	50.3
109	150	2.3	153.4	311	185	140	115	27.5	65.4
152	51	1.07	214.3	237	216	165	135	42	78
152	100	2.14	214.3	288	216	165	135	42	84
152	150	3.21	214.3	338	216	165	135	42	89.5
203	50	1.42	285.1	261	254	190	135	50	95.4
203	152	4.33	285.1	362	254	190	135	50	137
256	152	5.5	366.5	401	273	216	150	50	171
326	150	6.87	457.7	417	310	241	150	50	228.5
398	151	8.44	559	459	360	267	180	70	308.5
520	152	11.1	729.9	498	400	305	180	80	457
809	152	17.47	1134.1	565	480	380	340	80	735
1012	152	21.61	1419.3	620	450	425	380	90	1016

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.