Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 90mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke90 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20B
The AirTAC ACQJ40X90-20B is a double-acting JIS compact cylinder with a 90mm stroke and a male-thread piston rod end (M14x1.5) that couples directly to your load. An external M12x1.25 threaded stop and lock nut limits the extend end position, providing a usable extend range of 70-90mm without swapping parts. The retract stroke remains unaffected.
Because the adjuster only alters travel length, the piston area stays the same, meaning force is identical to a standard ACQ of this bore. The 40mm bore delivers 628.3N push and 527.8N pull at 0.5 MPa. It features fixed NBR elastomer bumpers at each end for end-of-stroke deceleration and operates on PT1/8 porting.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 90 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 ACQJ40X90-20B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×90 | 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 ACQJ40X90-20B Is Used
Machining Fixture Clamps
Dial in the exact clamping extension on a CNC machining center to accommodate raw material variations without machining new spacer blocks.
Packaging Diverter Arms
Adjust the pusher stroke on the fly during product changeover to handle different carton widths on a packaging line.
Assembly Press Stops
Set trial end positions for pressing bearings on an assembly machine, allowing operators to fine-tune insertion depth quickly.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20B the Right Cylinder?
If you need slightly less push force, the 32mm bore yields 402.1N at 0.5 MPa, whereas stepping up to the 50mm bore provides 981.8N. This 40mm bore hits a solid middle ground, reaching a maximum push of 128kgf at 1.0MPa. If your application never requires end-position changes, a fixed-stroke ACQ cylinder is simpler and sufficient. When ordering this adjustable version, confirm the 90mm full stroke, 20mm window, male M14x1.5 rod thread, and PT1/8 porting. Note that this specific unit ships without a magnet.
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 ACQJ40X90-20B FAQ
The usable extend range is 70-90mm (90mm full stroke minus the 20mm window). Force is identical to a standard ACQ: 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.
An external M12x1.25 threaded screw with a lock nut mechanically limits how far the rod extends, shortening the stroke without changing piston area, so force remains unchanged. The cylinder uses fixed elastomer bumpers, not adjustable cushions. It will not hold a load on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
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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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