Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 90mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke90 mm
- Port sizeM5×0.8
- Adjuster threadM8×1.25
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40B
The AirTAC ACQJ20X90-40B is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that restricts the extend end position. You can fine-tune the usable extend stroke anywhere from 50 mm up to the full 90 mm on the machine, while the retract stroke remains completely unaffected. Equipped with a male M8x1.25 rod end, it couples directly to your load.
Because the adjuster only limits travel and leaves piston area untouched, output force stays identical to a standard ACQ bore 20. You get 157.1 N push and 117.8 N pull at 0.5 MPa. The body incorporates fixed elastomer bumpers for end-of-stroke deceleration and includes magnetic-switch grooves, though this specific SKU ships without a magnet.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 90 mm |
| Adjuster thread | M8×1.25 |
| Port size | M5×0.8 |
| 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 | M5×0.8 (F) / M8×1.25 (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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40B Is Used
Product Changeover Stops
Quickly dial in new extend endpoints on packaging lines when switching to different carton sizes, using the external stop to set precise 50 to 90 mm positions without machining new spacers.
Trial End Positions
Determine optimal clamping depth on automated test fixtures by threading the stop in or out, finding the exact travel needed before finalizing a hard mechanical setup.
Setup-Varying Fixtures
Adapt assembly station stops on the fly for varying part heights, relying on the unchanged 157.1 N push force to drive the process while adjusting only the stroke length.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40B the Right Cylinder?
If you need slightly less force, the adjacent smaller bore 16 yields 100.5 N push at 0.5 MPa. For heavier thrust, stepping up to bore 25 provides 245.4 N push at 0.5 MPa. If your application never requires altering the extend endpoint, a fixed-stroke ACQ20 cylinder is a simpler choice. To order this adjustable version, confirm the 20 mm bore, 90 mm full stroke, 40 mm adjuster window, male M8x1.25 rod thread, and note that no magnet is included.
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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40B FAQ
It delivers 157.1 N push and 117.8 N pull at 0.5 MPa, 219.9 N push at 0.7 MPa, and a maximum push of 32 kgf at 1.0 MPa. The full stroke is 90 mm with a 40 mm adjustable window, giving a usable extend range of 50-90 mm. The retract stroke is unaffected. The external adjuster uses an M8x1.25 thread.
An external threaded stop with a lock nut limits the extend travel, allowing on-machine tuning without changing parts. It changes stroke length only, so force remains identical to a standard ACQ. The cylinder uses fixed elastomer bumpers, not adjustable air cushions. It will not hold a load on air loss; for fail-safe holding, add an external rod lock or pilot-operated check valve.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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