Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke300 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75SB
The AirTAC ACQJ40X300-75SB is a double-acting, single-rod JIS compact cylinder built for long-stroke, made-to-order applications. An external threaded stop with a lock nut limits the EXTEND end position, giving a usable extend range of 225-300 mm (full 300 mm stroke minus up to a 75 mm window). 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.
This model features a 16 mm piston rod and a male-thread (M14x1.5) rod end (-B) that couples directly to your load. The -S option provides a built-in piston magnet compatible with reed or electronic (solid-state) switches. Deceleration relies on a fixed elastomer (NBR) bumper at each end rather than an adjustable air cushion. Operating pressure spans 0.15-1.0 MPa, with a PT1/8 port.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 300 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 ACQJ40X300-75SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 ACQJ40X300-75SB Is Used
Varying Fixture Setups
Dial in the extend stop precisely when machining fixtures require different reach lengths without swapping out the entire cylinder body.
Product Changeover Stops
Adapt automated assembly lines quickly by turning the external M12x1.25 adjuster to meet new product dimensions on the fly.
Trial End Positions
Test and establish optimal end positions on prototype machinery, locking the nut once the perfect 225 to 300 mm extension is found.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75SB the Right Cylinder?
Selecting this 40 mm bore unit provides 628.3 N push force at 0.5 MPa. If your setup requires less power, the 32 mm bore yields 402.1 N push; for heavier demands, the 50 mm bore offers 981.8 N. A fixed-stroke ACQ is sufficient if your end position never varies. When ordering, confirm the 40 mm bore, 300 mm full stroke, 75 mm adjuster window, S magnet, and B male rod thread. Note that 300 mm exceeds the 100 mm standard max stroke for this bore, making it a long-stroke variant.
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 ACQJ40X300-75SB FAQ
The usable extend range is 225-300 mm via a 75 mm window. Force is identical to a standard ACQ: 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, with a maximum push of 128 kgf at 1.0 MPa. The retract stroke is unaffected.
The external M12x1.25 threaded stop and lock nut limit the extend length only, leaving force unchanged. Deceleration uses fixed NBR bumpers, not adjustable air cushions. A plain ACQ does not hold its load on air loss; for fail-safe holding, install an external rod lock or pilot-operated check valve.
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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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