Hi-Force 'HFL' Single Acting Low Height Fail Safe Lock Ring Cylinders, from 50 to 520 tonnes, Stroke Lengths 45 to 51mm

This low height single acting failsafe lock ring cylinder range combines all the versatility and efficiency of hydraulic power with the safety of mechanical load support, offering a sustainable lifting force in very confined work areas. Ideally suited for applications requiring load holding for extended periods, such as bridge support work.

The range features a single acting load return piston, threaded throughout its stroke length to suit the threaded mechanical load holding lock ring.

All models are suitable for vertical lifting only and are supplied with tilting saddles as standard.

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

• Capacities from 50 to 520 tonnes.
• Stroke lengths from 45 to 51mm.
• Working pressure 700 Bar.
• Load / Grivity return action.
• Stroke limiting device: Restriction Port.
• Single acting load return design.
• Nitrocarburised cylinder and piston rod.
• Low friction bearing surfaces.
• Anti-extrusion seals.
• Tilting saddle fitted as standard.
• 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	125	127	95	70	19	14.2
109	50	0.77	153.4	137	178	140	115	20	27.9
152	45	1.07	214.3	150	216	165	135	28	44.0
260	45	1.65	366.1	159	273	216	200	31	69.4
520	45	3.29	729.9	192	400	305	290	43	186

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.