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Model
70537, 70550, 70562
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By inserting a rod through the hollow piston, these cylinders can be used to push or pull depending on the orientation of the ram. They will actuate a rod of any length or shape and are extremely effective in translating power to a remote location. Greater forces are generated in these thru-hole rams because of their larger piston area.
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| Model No. |
RAM I.D.* |
NPT Port |
Stroke | Oil Displacement |
Force
at 3000 psig |
Dimensions |  |
||
| A | B | C | |||||||
| 70537 | .38 | 1/8 | .38 | .547 cu. in. | 4380 lbs. | 2.13 | 1.88 | 2.25 | |
| 70550 | .50 | 1/4 | .50 | 1.35 cu. in. | 8100 lbs. | 3.00 | 2.63 | 2.88 | |
| 70562 | .63 | 1/4 | .63 | 2.51 cu. in. | 12066 lbs. | 3.25 | 3.00 | 3.63 | |
*Clearance for rod or bolt of given dimension. - Maximum input pressure 3500 psig
Accessories
All
size thru-hole rams are supplied with a thru-hole insert threaded into
the top. Optional threaded inserts - inch or metric - are also available.
An accessory adapter plate is also available which fastens to the ram
base and permits mounting the ram with a single cap screw.
| Ram No. |
Thru-Hole
Insert (supplied) |
Threaded Insert (optional) | Optional Adapter Plate |
|
| Size | Part no. | |||
| 70537 | 705384 | 3/8-16 | 705382 | 705386 |
| 70550 | 705512 | 1/2-13 | 705510 | 705516 |
| 70562 | 705634 | 5/8-11 | 705632 | 705637 |
To
determine how much force is needed to replace a manual clamp, use this
chart as a guide.
| Loads Transmitted by Various Screws | ||||
| Bolt Size | Wrench Length | F-lbs. (Average) |  |
|
| 1/4 UNF | 4.00 | 2400 lbs. | ||
| 1/4 UNC | 4.00 | 1920 lbs. | ||
| 3/8 UNF | 5.75 | 3000 lbs. | ||
| 3/8 UNC | 5.75 | 2920 lbs. | ||
| 1/2 UNF | 8.00 | 4200 lbs. | ||
| 1/2 UNC | 8.00 | 3640 lbs. | A thru-hole ram easily converts a manual strap clamp into an automatic hydraulic powered clamp. Usually a longer bolt is the only part need to make this conversion. |  |
| 5/8 UNF | 9.00 | 5600 lbs. | ||
| 5/8 UNC | 9.00 | 5600 lbs. | ||
| 3/4 UNF | 9.00 | 4800 lbs. | ||
| 3/4 UNC | 11.00 | 4200 lbs. | ||
| 7/8 UNF | 12.00 | 5400 lbs. | ||
