Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-20SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-20SB 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 ACQJ140X250-20SB
The AirTAC ACQJ140X250-20SB is a double-acting JIS compact cylinder featuring a 140mm bore and a 250mm full stroke. An external threaded stop with a lock nut lets you fine-tune the extend end position on the machine, providing a usable extension range of 230 to 250mm. The retract stroke remains unaffected. Because the piston area is unchanged, force output is identical to a standard ACQ of this size.
This big-bore variant delivers 7696.9N of push force and 7294.8N of pull force at 0.5MPa. It includes a fixed NBR elastomer bumper at each end for end-of-stroke deceleration, rather than an adjustable air cushion. The -S option provides a built-in piston magnet compatible with reed or electronic solid-state switches, while the -B option supplies a male M30x1.5 rod-end thread for direct load coupling.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-20SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-20SB |
|---|---|
| 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 ACQJ140X250-20SB
| 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 ACQJ140X250-20SB Is Used
Heavy Press Tonnage Setup
Dial in the exact 230 to 250mm extend position during heavy press changeovers without machining new spacer collars or swapping cylinders.
Large Fixture Clamping
Adapt clamping endpoints on the fly for oversized automotive or structural fixtures, ensuring optimal grip force without reprogramming the machine.
Bending Machine Stops
Fine-tune the material forming depth on thick-plate bending machinery by adjusting the external stopper nut to accommodate varying material thicknesses.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-20SB the Right Cylinder?
For context on sizing, stepping down to a 125mm bore yields 6135.9N push at 0.5MPa, whereas stepping up to a 160mm bore provides 10053.1N. If your application requires a fixed 250mm extension without on-machine adjustability, a standard ACQ series cylinder is sufficient. When ordering this adjustable model, verify the 140mm bore, 250mm full stroke, 20mm adjustment window, the -S magnet requirement, 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 ACQJ140X250-20SB FAQ
At 0.5MPa, push force is 7696.9N and pull force is 7294.8N. At 0.7MPa, push force is 10775.7N, with a maximum push capacity of 1570kgf at 1.0MPa. The full stroke is 250mm, and the external adjuster allows the usable extend range to be shortened to 230mm (a 20mm window). The retract stroke remains at the full 250mm.
The external M27x2.0 threaded stop with a lock nut physically limits how far the rod extends, shortening the forward stroke without altering the piston area, so the force remains identical to a standard ACQ. The cylinder uses fixed elastomer bumpers for deceleration, so for high-energy loads, an external shock absorber is recommended. Note that a plain compact cylinder will not hold its load if air pressure is lost; use an external rod lock for fail-safe holding.
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Related AirTAC ACQJ Compact Cylinders
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