Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-50B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-50B 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 ACQJ40X90-50B
The AirTAC ACQJ40X90-50B is a double-acting JIS compact cylinder with a male-thread piston rod end (M14x1.5) that couples directly to your load. It features an external stop with a lock nut on the extend side, allowing you to fine-tune the end position on the machine without swapping components. The usable extend range is 40-90 mm, as the 50 mm window shortens the 90 mm full stroke, while the retract stroke remains completely unaffected.
Because the piston area stays the same, the output force is identical to a standard ACQ of this bore, delivering 628.3 N push and 527.8 N pull at 0.5 MPa. The unit uses a fixed NBR elastomer bumper at each end for deceleration rather than an adjustable air cushion. It operates at 30-500 mm/s, accepts PT1/8 porting, and includes sensor grooves, though this specific configuration ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-50B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-50B |
|---|---|
| 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 ACQJ40X90-50B
| 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 ACQJ40X90-50B Is Used
Machining Fixture Stops
Dial in the exact extend position during product changeovers on a CNC machining fixture without machining new stop collars.
Carton Sealing Pressure
Adjust the extend stroke on a packaging line to accommodate varying box heights while maintaining consistent sealing pressure.
Assembly Press Depth
Set precise travel limits for pressing bearings on an automated assembly machine, tweaking the depth on the fly for different part batches.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X90-50B the Right Cylinder?
When sizing this 40 mm bore, dropping down to a 32 mm bore reduces the push force to 402.1 N at 0.5 MPa, while stepping up to a 50 mm bore increases it to 981.8 N. If your end position never varies, a fixed-stroke ACQ cylinder is sufficient. To order, confirm the 40 mm bore, 90 mm full stroke, 50 mm adjuster window, the male rod thread option, and whether you need the S magnet for solid-state or reed switches.
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 ACQJ40X90-50B FAQ
The push force is 628.3 N and pull is 527.8 N at 0.5 MPa, with a push of 879.6 N at 0.7 MPa and a maximum push of 128 kgf at 1.0 MPa. The full stroke is 90 mm, but the external M12x1.25 adjuster allows you to shorten the extend stroke by up to 50 mm, yielding a usable extend range of 40-90 mm.
The threaded stop with a lock nut limits only the extend end position; it changes stroke length but not piston area, so force is unchanged. The retract stroke is unaffected. Deceleration relies on a fixed elastomer bumper, not an adjustable air cushion, so for high energy loads you should add an external shock absorber.
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Related AirTAC ACQJ Compact Cylinders
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