Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-75SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-75SB 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 ACQJ140X250-75SB
The ACQJ140X250-75SB is a double-acting JIS compact cylinder engineered for big-bore tasks, offering a 250mm full stroke with a 75mm external adjustment window. By turning the M27x2.0 threaded stop and locking the nut, operators can set the extend travel anywhere between 175mm and 250mm right at the machine without swapping components. The retract movement remains completely unaffected by this modification.
Because the internal piston area stays constant, output force equals that of a standard ACQ of identical size: 7696.9N push and 7294.8N pull at 0.5MPa. This big-bore unit integrates fixed NBR elastomer bumpers at each end for end-of-travel deceleration rather than adjustable air cushions. The -S magnet enables position detection via reed or solid-state switches, while the -B male M30x1.5 rod end threads directly to your load.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-75SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-75SB |
|---|---|
| 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 ACQJ140X250-75SB
| 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 ACQJ140X250-75SB Is Used
Heavy Press Fixturing
Dial in the exact 175 to 250mm clamping extension on a large metal-forming press during setup, allowing rapid accommodation of new die heights without machining custom spacers.
Automotive Assembly Stops
Adjust the end-of-stroke position on the fly for product changeovers, accommodating different chassis lengths or component dimensions on a single heavy-duty transfer line.
Large-Format Palletizing
Fine-tune the extend distance when handling oversized pallets or varying box sizes, testing trial end positions safely before finalizing the mechanical stop lock.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-75SB the Right Cylinder?
When sizing this 140mm bore actuator, compare its 7696.9N push at 0.5MPa against neighboring bores: the 125mm yields 6135.9N, and the 160mm provides 10053.1N. If your extend target is permanently fixed at 250mm without future variation, a non-adjustable ACQ cylinder suffices. To order this adjustable variant, confirm the 140mm bore, 250mm base stroke, 75mm 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 ACQJ140X250-75SB FAQ
This cylinder provides 7696.9N push and 7294.8N pull at 0.5MPa, 10775.7N push at 0.7MPa, and a maximum push of 1570 kgf at 1.0MPa. The usable extend range is 175 to 250mm, achieved by utilizing the 75mm adjustment window on the 250mm full stroke.
The external M27x2.0 threaded stop alters only the extend length, keeping force identical to a standard ACQ. Fixed elastomer bumpers decelerate the rod near stroke ends, but for high energy you should add external shock absorbers. Note that a plain compact cylinder drifts on air loss; use an external rod lock or pilot check valve for fail-safe load holding.
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Related AirTAC ACQJ Compact Cylinders
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