Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50 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 ACQJ40X250-50
The ACQJ40X250-50 is a double-acting JIS compact cylinder built for made-to-order long-stroke applications, featuring a 250mm total stroke paired with a 50mm external adjustment window. An external M12x1.25 threaded stop and lock nut lets you fine-tune the extend end position on the machine, yielding a usable forward range of 200 to 250mm. The retract stroke remains completely unaffected by this mechanism.
Because the adjustment hardware only limits forward travel without altering piston area, output force stays identical to a standard ACQ of this bore. The 40mm bore generates 628.3N push and 527.8N pull at 0.5MPa, while the 16mm rod uses a default M8x1.25 female thread end. Fixed NBR elastomer bumpers absorb impact at both ends, and the body includes sensor grooves, though this specific SKU ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50 |
|---|---|
| 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 ACQJ40X250-50
| 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 ACQJ40X250-50 Is Used
Variable Length Stop Testing
Ideal for trial end positions on packaging equipment where the extend target must be shifted between 200 and 250mm to dial in the exact sealing or cutting depth.
Product Changeover Stops
Enables rapid on-machine adjustments for handling different part lengths on a conveyor line without swapping out the entire actuator assembly.
Setup-Varying Fixtures
Provides flexible clamping reach on automated machining fixtures, allowing operators to fine-tune the 40mm bore forward stop for varied workpiece geometries.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50 the Right Cylinder?
Choosing this bore involves balancing force and physical space; dropping to a 32mm bore reduces 0.5MPa push to 402.1N, whereas stepping up to 50mm increases it to 981.8N. If your extend end position never varies, a fixed-stroke ACQ cylinder is simpler and avoids the external adjuster hardware. When ordering this adjustable variant, confirm the 40mm bore, 250mm total stroke, 50mm window, female rod thread, and note that a -S magnet suffix is required if position sensing is needed.
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 ACQJ40X250-50 FAQ
This 40mm bore cylinder delivers 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa. The full stroke is 250mm, but the external adjuster allows you to shorten the extend stroke by up to 50mm, giving a usable forward range of 200 to 250mm.
The M12x1.25 threaded stop with lock nut physically limits how far the rod extends, changing only the stroke length while keeping force identical to a standard ACQ. Impact is handled by fixed NBR elastomer bumpers rather than adjustable air cushions. The body has sensor grooves, but this specific model ships without a magnet, so add the -S option if you need reed or solid-state switch compatibility.
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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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