Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40SB 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 ACQJ20X90-40SB
The AirTAC ACQJ20X90-40SB is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend stroke anywhere from 50 mm up to the full 90 mm directly on your machine, while the retract stroke remains completely unaffected. Because the adjuster only alters travel length and not piston area, the output force is identical to a standard ACQ of this bore.
This model includes a built-in piston magnet for position sensing and a male M8x1.25 piston rod end for direct load coupling. It features a fixed elastomer bumper at each end for end-of-stroke deceleration and operates with a 10 mm rod diameter and M5x0.8 port. The external adjuster utilizes an M8x1.25 thread, giving you precise on-machine end-position tuning without swapping out cylinder parts.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40SB |
|---|---|
| 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 ACQJ20X90-40SB
| 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 ACQJ20X90-40SB Is Used
Machining Fixture Stops
Dial in the extend position from 50 to 90 mm on a machining fixture to accommodate varying part lengths without fabricating new mechanical stops.
Product Changeover Diverters
Quickly reposition a conveyor diverter arm end-stop during product family changeovers by rotating the external lock nut to the needed travel.
Packaging Machine Trial Positions
Test different end positions on a packaging carton sealer to find the exact 50-90 mm extend point required for a new box format.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-40SB the Right Cylinder?
If your application needs less push force, the 16 mm bore version delivers 100.5 N push at 0.5 MPa, whereas stepping up to the 25 mm bore yields 245.4 N. Choose this 20 mm bore if 157.1 N push at 0.5 MPa fits your load. A fixed-stroke standard ACQ is sufficient if your extend end position never varies. For this model, confirm the 90 mm full stroke, 40 mm adjuster window, S magnet option, and B male rod thread when ordering.
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 ACQJ20X90-40SB FAQ
The force is identical to a standard ACQ bore 20: 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, and with the 40 mm window, the usable extend range is 50-90 mm.
An external M8x1.25 threaded stop with a lock nut mechanically limits the extend stroke, leaving the retract stroke unaffected. The cylinder uses fixed elastomer bumpers for deceleration rather than adjustable air cushions. The built-in magnet works with reed or solid-state electronic switches.
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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