Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke250 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50S
The AirTAC ACQJ40X250-50S is a double-acting, single-rod JIS compact cylinder engineered as a long-stroke, made-to-order variant for bore 40. An external threaded stop with a lock nut restricts the extend end position, yielding a usable forward travel range of 200 to 250 mm. The return stroke remains completely unaffected. Because the piston area stays constant, output force equals that of a standard ACQ unit.
This 40 mm bore actuator features a 16 mm rod, a PT1/8 port, and a female M8x1.25 rod-end thread. The external adjuster uses an M12x1.25 thread. It incorporates a built-in piston magnet for use with reed or solid-state switches, and relies on fixed elastomer bumpers at both ends for deceleration.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 250 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 ACQJ40X250-50S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 ACQJ40X250-50S Is Used
Product Changeover Stops
Adjust the external stop to modify extend length during packaging line format changeovers, avoiding the need to swap out entire actuators for different carton sizes.
Trial End Positions
Dial in the exact clamping end position on machining fixtures during initial prototype runs, testing different extend lengths without replacing hardware.
Setup-Varying Fixtures
Fine-tune the forward stroke on welding stations to accommodate varying material thicknesses, ensuring consistent pressure application across multiple jigs.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50S the Right Cylinder?
If your setup needs less push force, the adjacent 32 mm bore yields 402.1 N push at 0.5 MPa, whereas the larger 50 mm bore provides 981.8 N push. If the end position never varies, a fixed-stroke ACQ cylinder suffices. When ordering this long-stroke unit, confirm the 40 mm bore, 250 mm full stroke, 50 mm adjuster window, the S magnet option, and the default female rod thread.
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 ACQJ40X250-50S FAQ
The usable extend range is 200 to 250 mm. Push force is 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa. Pull force is 527.8 N at 0.5 MPa. Maximum push force is 128 kgf at 1.0 MPa. The 50 mm adjustment window only limits forward travel.
No. The adjuster changes stroke length only, leaving piston area and force unchanged. The retract stroke is unaffected. The cylinder uses fixed elastomer bumpers at both ends, and the built-in magnet works with reed or electronic switches.
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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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