Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke50 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50SB
The AirTAC ACQJ140X50-50SB is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that restricts the extend stroke. You can fine-tune the extend end position directly on your equipment, yielding a usable extend range of 0-50mm from the 50mm full stroke. The retract movement remains completely unaffected by this adjustment. A male M30x1.5 piston rod end (-B) couples directly to your load, while the integrated magnet (-S) tracks position.
Because the adjuster solely alters travel length without modifying piston area, output force stays identical to a standard ACQ of this bore. The 140mm big-bore body generates 7696.9N push and 7294.8N pull at 0.5MPa, running on PT3/8 ports. Deceleration relies on a fixed NBR elastomer bumper at each end rather than an adjustable air cushion, making it optimal for high-force automation within the 300mm max standard stroke range.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 50 mm |
| Adjuster thread | M27×2.0 |
| Port size | PT3/8 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Rod thread | M22×2.5 (F) / M30×1.5 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
Theoretical Output Force (Ø140mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 7697 N | 7295 N |
| 0.7 MPa | 10776 N | — |
| Max (@1.0 MPa) | 1570 kgf | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×50 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Where the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50SB Is Used
Press Fixture Changeover
Dial in the exact 0-50mm extend stop during product family changeovers on large stamping presses without machining new spacer rings.
Heavy Material Forming
Set precise end positions for heavy-gauge metal forming operations where the 7696.9N push force at 0.5MPa is required to seat components.
Adjustable Clamping Stops
Modify the clamping depth on the fly for varying workpiece thicknesses in automated welding cells using the external M27x2.0 adjuster.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50SB the Right Cylinder?
For lower force needs, the 100mm bore variant outputs 3927.0N push at 0.5MPa, whereas stepping up to the 160mm bore yields 10053.1N push. If your setup never requires altering the extend endpoint, a fixed-stroke ACQ cylinder is simpler and sufficient. When ordering this adjustable model, verify the 140mm bore, 50mm full stroke, 50mm window, the -S magnet for electronic or reed switches, and the -B male M30x1.5 rod thread.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-50SB FAQ
It delivers 7696.9N push and 7294.8N pull at 0.5MPa, 10775.7N push at 0.7MPa, and a maximum push of 1570kgf at 1.0MPa. The full stroke is 50mm with a 50mm adjustable window, giving a usable extend range of 0-50mm. It operates at 0.15-1.0MPa with PT3/8 ports and a 32mm rod.
The external M27x2.0 threaded stop and lock nut limit how far the rod extends, shortening the travel length without changing the piston area, so force remains identical to a standard ACQ. Fixed NBR elastomer bumpers decelerate the load near stroke end. For fail-safe load holding on air loss, you must add an external rod lock or pilot-operated check valve, as the cylinder drifts when unpressurized.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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