Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40S 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 ACQJ40X300-40S
The ACQJ40X300-40S is a double-acting, single-rod JIS compact cylinder built for specialized long-stroke applications, featuring a 300mm total stroke that exceeds the standard 100mm maximum for this bore. It integrates an external threaded stop with a lock nut, allowing you to fine-tune the extend end position directly on your equipment. The usable extend range spans 260mm up to the full 300mm, while the retract stroke remains completely unaffected.
Because the adjustment mechanism only limits travel length and leaves piston area untouched, output force is identical to a standard ACQ of the same bore. You get 628.3N push and 527.8N pull at 0.5MPa, and 879.6N push at 0.7MPa. The Ø16mm piston rod utilizes a female M8x1.25 thread, and the body includes fixed elastomer bumpers at both ends for end-of-stroke deceleration rather than adjustable air cushions.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40S |
|---|---|
| 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 ACQJ40X300-40S
| 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 ACQJ40X300-40S Is Used
Multi-Part Machining Fixtures
Dial in the extend stop between 260mm and 300mm to accommodate different raw casting lengths on a single CNC lathe without machining custom spacer blocks.
Package Changeover Diverter
Adjust the routing arm's end position on-site to handle varying box widths on a packaging line, ensuring positive stops without reprogramming PLC coordinates.
Long-Reach Press Ejector
Utilize the 300mm travel to extract deep-draw parts from a hydraulic press, tweaking the final ejection point by up to 40mm to clear new die geometries.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40S the Right Cylinder?
For sizing context, stepping down to a 32mm bore yields 402.1N push at 0.5MPa, while stepping up to a 50mm bore provides 981.8N push. If your application requires a fixed extend position every cycle and never varies, a standard ACQ40 cylinder will suffice. When ordering, confirm the 40mm bore, 300mm full stroke, 40mm adjustable window, the -S magnet option, and your required rod-end thread type.
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 ACQJ40X300-40S FAQ
It 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 300mm, and the external M12x1.25 adjuster allows the extend stroke to be shortened by up to 40mm, yielding a usable extend range of 260-300mm.
No, the external stop only limits how far the rod extends; it does not alter piston area, so force remains identical to a standard ACQ40. End-of-travel deceleration is handled by fixed NBR elastomer bumpers at both ends, not adjustable air cushions, so external shock absorbers may be needed 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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