Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 25mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke25 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30B
The AirTAC ACQJ40X25-30B is a double-acting JIS compact cylinder featuring a male-thread (M14x1.5) piston rod and an external stroke adjuster. A threaded stop with a lock nut restricts the extend length, yielding a usable forward range of 0-25mm from the 25mm total stroke. The retract distance remains completely unaffected by this mechanism.
Because the adjuster solely limits travel without altering the 40mm piston area, output force stays identical to a standard ACQ equivalent. The body incorporates fixed NBR elastomer bumpers at both ends for end-of-travel deceleration rather than adjustable air cushions. It operates between 0.15 and 1.0 MPa, delivering a maximum push capacity of 128 kgf at 1.0 MPa.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 25 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| 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 | M8×1.25 (F) / M14×1.5 (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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30B Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining fixture during setup. The external M12x1.25 adjuster lets operators tweak the 0-25mm extend position without swapping hardware.
Product Changeover Guides
Adapt a packaging line's product diverter on the fly. When carton sizes change, shorten the extend stroke instantly to accommodate new dimensions without reprogramming the PLC.
Assembly Press Positioning
Establish trial end positions for a light-duty assembly press. Fine-tune the pressing depth within the 30mm window to find the optimal insertion point before locking the nut down.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30B the Right Cylinder?
Selecting this 40mm bore unit provides 628.3N of push force at 0.5MPa, sitting between the 32mm bore (402.1N push) and the 50mm bore (981.8N push). If your application never requires end-position changes, a fixed-stroke ACQ cylinder is sufficient and simpler. When ordering, verify the 25mm total stroke, the 30mm adjustment window, the male M14x1.5 rod thread, and the PT1/8 port. This variant lacks the -S magnet option, meaning it ships without a piston magnet for reed or solid-state sensing, even though the body retains sensor grooves.
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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-30B FAQ
This 40mm bore cylinder delivers 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128 kgf at 1.0MPa. The full stroke is 25mm with a 30mm adjustment window, allowing the usable extend range to be set anywhere from 0 to 25mm.
The external M12x1.25 threaded stop with lock nut limits only the extend travel, leaving the retract stroke and the piston area untouched, meaning force remains identical to a standard ACQ. Fixed NBR bumpers decelerate the load at stroke ends, but since this is a plain double-acting cylinder, it will not hold its load on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
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Related AirTAC ACQJ Compact Cylinders
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