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.

125 mm Pneumatic Cylinder: Force Chart and Air Consumption

Force Chart by Pressure

Theoretical values; catalogue 6 bar figures allow for friction.

125 mm Pneumatic Cylinder: Force Chart and Air Consumption
PressurePush (N)Push (kgf)Push (lbf)Pull (kgf)
4 bar (58 psi)4,9095011,104468
6 bar (87 psi)7,3637511,655702
8 bar (116 psi)9,8171,0012,207935
10 bar (145 psi)12,2721,2512,7591,169

Catalogue at 6 bar: push 735 kg, pull 688 kg.

Air Consumption (6 bar, double stroke)

Free air in litres.

Air Consumption (6 bar, double stroke)
Stroke (mm)Air (L)
508.2
10016.4
20032.9
30049.3
50082.2

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

Compared with Neighbouring Bores
BoreRodPush 6 bar (kg)Pull 6 bar (kg)
Ø100Ø25471441
Ø125 ◄Ø32735688
Ø160Ø401,2061,111

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.

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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.

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