Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20SB 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 ACQJ40X90-20SB
The ACQJ40X90-20SB is a double-acting JIS compact cylinder with an external extend stop. A threaded rod and lock nut let you shorten the forward stroke by up to 20mm, giving a usable extend range of 70 to 90mm. The return stroke remains fixed at 90mm. Because the piston area is unchanged, output force matches a standard ACQ exactly.
This unit features a 16mm rod with a male M14x1.5 end thread for direct load coupling. It includes a piston magnet for position sensing and fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration. Operating pressure is 0.15-1.0 MPa with a PT1/8 port.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20SB |
|---|---|
| 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 ACQJ40X90-20SB
| 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 ACQJ40X90-20SB Is Used
Machining Fixture Stops
Dial in the exact clamping extension on a CNC lathe fixture during new product changeovers without machining new spacer rings.
Carton Sealing Heads
Tune the pressing depth of a sealing jaw on a packaging line to accommodate different corrugated box thicknesses on the fly.
Bending Machine Backgauges
Adjust the material stop position on a press brake to test trial bend locations accurately before final production runs.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-20SB the Right Cylinder?
For 0.5MPa operations, this 40mm bore generates 628.3N push and 527.8N pull force. If your application needs less force, a 32mm bore provides 402.1N push; for heavier loads, a 50mm bore yields 981.8N push. Choose this adjustable model when setups require frequent end-position tuning; a fixed-stroke ACQ suffices for static stops. Confirm your ordering essentials: 40mm bore, 90mm full stroke, 20mm adjust window, male rod thread (-B), and magnet (-S).
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 ACQJ40X90-20SB FAQ
At 0.5MPa it provides 628.3N push and 527.8N pull force, and 879.6N push at 0.7MPa. Maximum push force is 128kgf at 1.0MPa. The full stroke is 90mm with a 20mm adjust window, yielding a usable extend range of 70-90mm.
An external M12x1.25 threaded stop with a lock nut limits forward travel without altering piston area, so force remains identical to a standard ACQ. Retract stroke is unaffected. Fixed NBR bumpers decelerate the load at stroke ends; for high energy, add an external shock absorber. The -S magnet works with reed or solid-state switches.
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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.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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