Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40SB 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 ACQJ40X300-40SB
The ACQJ40X300-40SB is a double-acting, single-rod JIS compact cylinder built for applications requiring precise extend-end positioning. As a long-stroke made-to-order variant, it provides a 300mm total stroke with an external M12x1.25 threaded stop and lock nut, allowing you to dial the usable extend range down to 260mm without swapping components. The retract stroke remains fixed at the full 300mm. Because the adjuster only limits travel and leaves piston area untouched, output force is identical to a standard ACQ of the same bore.
Equipped with a male M14x1.5 piston rod end (-B) and an internal magnet (-S), this unit couples directly to loads and supports both reed and solid-state electronic switches. It features a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. Operating pressure spans 0.15 to 1.0 MPa, and the PT1/8 porting ensures reliable pneumatic supply to the 16mm rod.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40SB |
|---|---|
| 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 ACQJ40X300-40SB
| 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 ACQJ40X300-40SB Is Used
Machining Fixture Tuning
Adjust the extend stop on a CNC machining fixture to accommodate varying raw material thicknesses without fabricating new mechanical stops.
Packaging Line Changeover
Reposition the diverter arm end-point during packaging format changeovers by turning the external adjuster to hit a new carton size instantly.
Assembly Press Trials
Dial in the exact extension depth during electronic PCB assembly press trials to find the optimal seating force without reprogramming the PLC.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-40SB the Right Cylinder?
When sizing this 40mm bore actuator, note it delivers 628.3N push and 527.8N pull at 0.5 MPa. Stepping down to a 32mm bore drops push force to 402.1N, while a 50mm bore increases it to 981.8N. If your process never requires altering the extend endpoint, a standard fixed-stroke ACQ cylinder will suffice. For this adjustable model, confirm your ordering essentials: 40mm bore, 300mm base stroke, 40mm adjustment window, male rod thread, and the integrated magnet.
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 ACQJ40X300-40SB FAQ
This cylinder delivers a push force of 628.3N and a pull force of 527.8N at 0.5 MPa, 879.6N push at 0.7 MPa, and a maximum push of 128kgf at 1.0 MPa. The usable extend range is 260-300mm (a 40mm adjustment window off the 300mm full stroke).
The external M12x1.25 threaded stop limits only the extend travel length, so output force remains identical to a standard ACQ bore 40. The unit relies on fixed NBR elastomer bumpers at both ends for deceleration rather than adjustable air cushions, meaning high-energy loads may require external shock absorbers.
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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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