125 mm Pneumatic Cylinder: Force Chart and Air Consumption
A 125 mm bore pneumatic cylinder (≈ 4.92 in) has a Ø32 mm rod and, per the Fenitsa catalogue, pushes 735 kg and pulls 688 kg at 6 bar (87 psi). Its piston area is 122.7 cm².
Typical uses: heavy automation lines, foundry core boxes, block and brick machines. Standard strokes 50–500 mm; any stroke on request up to 2,800 mm for Ø125.

Force Chart by Pressure
Theoretical values; catalogue 6 bar figures allow for friction.
| Pressure | Push (N) | Push (kgf) | Push (lbf) | Pull (kgf) |
|---|---|---|---|---|
| 4 bar (58 psi) | 4,909 | 501 | 1,104 | 468 |
| 6 bar (87 psi) | 7,363 | 751 | 1,655 | 702 |
| 8 bar (116 psi) | 9,817 | 1,001 | 2,207 | 935 |
| 10 bar (145 psi) | 12,272 | 1,251 | 2,759 | 1,169 |
Catalogue at 6 bar: push 735 kg, pull 688 kg.
Air Consumption (6 bar, double stroke)
Free air in litres.
| Stroke (mm) | Air (L) |
|---|---|
| 50 | 8.2 |
| 100 | 16.4 |
| 200 | 32.9 |
| 300 | 49.3 |
| 500 | 82.2 |
Series and Mountings in This Bore
FMY (ISO 15552, magnetic piston, adjustable cushioning), PNS-PNSY (CETOP RP 53P) and PMB; every series also as double rod (C), tandem (T) and two-position (D). Mountings: clevis, flange, foot, trunnion, rod-end clevis and spherical eye.
Application Example
To move a 300 kg load at a 50 % load ratio (usual for moving loads), a Ø125 cylinder needs about 4.8 bar (70 psi).
Compared with Neighbouring Bores
| Bore | Rod | Push 6 bar (kg) | Pull 6 bar (kg) |
|---|---|---|---|
| Ø100 | Ø25 | 471 | 441 |
| Ø125 ◄ | Ø32 | 735 | 688 |
| Ø160 | Ø40 | 1,206 | 1,111 |
Against Ø100, the Ø125 bore has 56 % more piston area and pushes 264 kg more at 6 bar; its pull-to-push ratio is 94 %.
Frequently Asked Questions
How much force does a 125 mm pneumatic cylinder produce?
Per the catalogue, 735 kg push and 688 kg pull at 6 bar; at 10 bar the theoretical push is 1,251 kgf (2,759 lbf).
What rod size does a 125 mm cylinder have?
Ø32 mm (1.26 in).
How much air does a 125 mm cylinder use?
About 16.4 litres of free air per double stroke for a 100 mm stroke at 6 bar.
What load can a Ø125 cylinder move at 6 bar?
About 375 kg as a moving load at a 50 % load ratio; for static clamping up to the catalogue 735 kg.
Send Us Your Cylinder Data
Bore, rod, stroke, working pressure, mountings and quantity — or a drawing or photo of the cylinder you want to replace. Our engineers reply with a technical proposal and a quotation.
Related Pages
Pneumatic cylinder sizes
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Air cylinder calculator
Force at any pressure
100 mm Pneumatic Cylinder
Neighbouring bore
160 mm Pneumatic Cylinder
Neighbouring bore
Pneumatic Cylinders
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