Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30S 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 ACQJ40X250-30S
The ACQJ40X250-30S 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 range from 220 mm up to the full 250 mm stroke directly on the machine, while the retract stroke remains completely unaffected. Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore.
This long-stroke made-to-order variant exceeds the 100 mm standard maximum for this bore size. It features a Ø16 mm piston rod, PT1/8 port, and an M12x1.25 external adjuster thread. The body includes fixed elastomer bumpers at each end and, thanks to the -S magnet option, works seamlessly with reed or electronic solid-state sensors.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30S |
|---|---|
| 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 ACQJ40X250-30S
| 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 ACQJ40X250-30S Is Used
CNC Lathe Bar Feeder
Dial in the exact raw material push distance from 220 to 250 mm during material changeovers without swapping out the entire cylinder assembly.
Package Divert Gate
Adjust the actuation length on the fly to handle varying box sizes on a packaging line, ensuring the diverter arm hits the correct contact point.
Assembly Press Locator
Set precise downward travel limits for pressing bearings into housings, allowing quick recipe adjustments for different housing depths on the same machine.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-30S the Right Cylinder?
When sizing this unit, consider the 628.3 N push force at 0.5 MPa. If your application needs less force, stepping down to a 32 mm bore yields 402.1 N push, whereas moving up to a 50 mm bore provides 981.8 N. If exact end-position tuning is unnecessary, a fixed-stroke ACQ cylinder will suffice. To order, confirm the 40 mm bore, 250 mm full stroke, 30 mm window, the -S magnet requirement, and the default female M8x1.25 rod-end 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 ACQJ40X250-30S FAQ
It delivers 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The full stroke is 250 mm, but the external stop allows you to shorten the extend stroke by up to 30 mm, giving a usable extend range of 220-250 mm.
No, the external M12x1.25 threaded stop only limits the travel distance; the piston area remains the same so force is unchanged. Deceleration is handled by fixed NBR elastomer bumpers at each end, not adjustable air cushions, so you may need an external shock absorber for high-energy loads.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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