Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-40S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-40S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke250 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-40S
The AirTAC ACQJ140X250-40S is a double-acting JIS compact cylinder featuring a 140mm bore and a 250mm full stroke. An external threaded stop with a lock nut restricts the rod extension, allowing you to set the extend end position anywhere in the 210 to 250mm usable range. The retract movement remains fixed at its standard length. Because the adjuster only limits travel, the piston area stays the same, meaning the output force is identical to a standard ACQ of this bore.
This big-bore variant delivers 7696.9 N of push force and 7294.8 N of pull force at 0.5 MPa, peaking at 1570 kgf maximum push at 1.0 MPa. It features a 32mm piston rod, a PT3/8 port, and an M27x2.0 adjuster thread. Fixed NBR elastomer bumpers absorb shock at both ends, and the built-in magnet (-S) works with reed or solid-state switches. Note that a plain air cylinder will not hold its load on air loss; pair it with an external rod lock for fail-safe holding.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-40S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-40S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 250 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 ACQJ140X250-40S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×250 | 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 ACQJ140X250-40S Is Used
Heavy Press Tonnage Setup
Dial in the exact 210 to 250mm extend position during heavy press commissioning without machining new spacers or swapping cylinders.
Automotive Product Changeover
Quickly alter the extend stop to accommodate different chassis or subassembly widths on a single line for rapid model changeovers.
Large Fixture Clamping
Fine-tune clamping reach on oversized welding fixtures, ensuring the 32mm rod hits the exact contact point without over-traveling.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-40S the Right Cylinder?
When sizing this unit, stepping down to a 125mm bore yields 6135.9 N push at 0.5 MPa, while stepping up to a 160mm bore provides 10053.1 N. Choose this 140mm model when your application requires roughly 7696.9 N of thrust but still needs on-machine travel adjustments. If the end position never varies, a fixed-stroke ACQ cylinder is simpler and sufficient. To order correctly, confirm the 140mm bore, 250mm full stroke, 40mm adjustable window, the -S magnet option, and your preferred rod-end thread (default female M22x2.5).
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 ACQJ140X250-40S FAQ
It provides 7696.9 N push and 7294.8 N pull at 0.5 MPa, 10775.7 N push at 0.7 MPa, and a maximum push of 1570 kgf at 1.0 MPa. The full stroke is 250mm, and the external stop allows an adjustable extend range of 210 to 250mm.
The external M27x2.0 threaded stop with lock nut limits only the extend stroke length; it does not change the piston area, so force remains identical to a standard ACQ. Deceleration is handled by fixed NBR elastomer bumpers, not an adjustable air cushion. For high-energy impacts, add an external shock absorber.
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Related AirTAC ACQJ Compact Cylinders
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