Hollow Ram Jacks (Hydraulic) available for Hire

Hollow ram hydraulic jacks used with high tensile pulling bars for stressing and clamping operations, all jacks are manufactured from high quality steel. Hard chrome plated plungers combined with polyurethane ram wipers help prevent scratching or corrosion and extend the life of the jack.
 
We offer nine different models of hollow ram jacks ranging from 10 to 100 tons in capacity. All our hollow ram jacks are fitted with a quick release input couplings and special retraction springs for easy plunger return, the HR60 and HR100 models have two lifting handles fitted.
 

Hollow Ram Cylinders (Single-Acting) available for Hire

MODEL NUMBER										Capacity (tons)	Max. Stoke (mm)	Closed Height (mm) - H	External    Dia,      (mm) - D1	Plunger      Dia,     (mm) - D2	Plunger      Hole     (mm) - D3	Litres	WEIGHT (Kgs)	Data Sheet
HR10-041										10	41	121	70	35	19	0.08	2.8
HR10-076										10	76	184	70	35	19	0.15	3.9
HR20-051										20	51	162	100	55	27	0.17	7.2
HR20-154										20	154	306	100	55	27	0.49	13.4
HR30-64										30	64	179	115	63	33	0.28	10.4
HR30-155										30	155	331	115	63	33	0.65	19.5
HR60-76										60	76	249	159	93	54	0.66	29.8
HR60-152										60	152	325	159	93	54	1.32	36.8
HR100-76										100	76	255	213	125	79	1.11	51.4

 

Fixing Details

MODEL NUMBER										HR10	HR20	HR30	HR60	HR100
Bolt Size (UNC)										5/16" x 18	3/8" x 16	3/8" x 16	1/2" x 13	5/8" x 11
Depth (mm) - E										9.0	9.4	14.0	14.0	19.0
P.C.D (mm) -E										50.8	82.5	92.0	130.0	178.0
Thread (mm) - F										2"-3/4" x 16	3"-7/8" x 12	4"-1/2" x 12	6"-1/4" x 12	5/8"-3/8" x 12
Length (mm) - F										30.0	38.0	42.2	48.5	60.5

The cylinder body has two mounting holes which enables fixing to machinery such as, fixtures, clamping jigs, spreader plates, etc., the plungers load contact area is also grooved to increase its horizontal grip.
 
The jack should only be operated between parallel surfaces, if this is not the case then use a steel tapered shim which must cover the full plunger area or install and level a steel plate bedded on a high strength mortar or grout.