Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20 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 ACQJ40X25-20
The AirTAC ACQJ40X25-20 is a double-acting JIS compact cylinder featuring an external M12x1.25 threaded stop with a lock nut. This mechanism allows you to fine-tune the extend end position on the machine, providing a usable extend range of 5-25mm from the 25mm full stroke. The retract stroke remains completely unaffected by this adjustment.
Because the piston area is unchanged, output force matches a standard ACQ exactly, delivering 628.3N push and 527.8N pull at 0.5MPa. The body incorporates a fixed NBR elastomer bumper at each end for end-of-stroke deceleration and includes magnetic-switch grooves, though this specific unit ships without a magnet. It uses a PT1/8 port and a 16mm rod with a female M8x1.25 end thread.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20 |
|---|---|
| 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 ACQJ40X25-20
| 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 ACQJ40X25-20 Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC machining center during setup. The external stop lets operators shift the extend endpoint by millimeters without swapping cylinders.
Product Changeover Pins
Accommodate varying package sizes on a packaging line. Adjust the extend stroke from 5 to 25mm on the fly to position pusher pins for different carton depths.
Assembly Press Positioning
Find the optimal trial end position for pressing bearings on an assembly line. The lock nut secures the exact 16mm extend depth once the ideal travel is found.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X25-20 the Right Cylinder?
Selecting this 40mm bore provides 628.3N push at 0.5MPa; stepping down to a 32mm bore drops push to 402.1N, while a 50mm bore raises it to 981.8N. If your application never requires end-position tuning, a fixed-stroke ACQ cylinder is sufficient. When ordering, confirm the 40mm bore, 25mm full stroke, 20mm adjuster window, female rod thread, and whether you need the -S magnet option for electronic or reed sensors.
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 ACQJ40X25-20 FAQ
It delivers 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa. The full stroke is 25mm, and with the 20mm adjustment window, the usable extend range is 5-25mm.
An M12x1.25 threaded screw with a lock nut limits the extend length without changing the piston area, so force remains identical to a standard ACQ. Deceleration relies on fixed NBR elastomer bumpers, not adjustable air cushions, so external shock absorbers are recommended for high-speed loads.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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