Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 175mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke175 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-20SB
The AirTAC ACQJ40X175-20SB 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 155 mm up to the full 175 mm stroke directly on the machine without swapping parts. The retract stroke remains completely unaffected. This unit includes a male M14x1.5 piston rod end for direct load coupling and a built-in piston magnet for sensing.
Because the adjuster only alters travel length and not piston area, the output force is identical to a standard ACQ of the same bore: 628.3 N push and 527.8 N pull at 0.5 MPa. This long-stroke made-to-order variant exceeds the 100 mm standard maximum for this bore size, extending up to the 300 mm long-stroke limit. It features fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration rather than an adjustable air cushion.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 175 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 ACQJ40X175-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 ACQJ40X175-20SB Is Used
Machining Fixture Clamps
Dial in the exact clamping extension between 155 and 175 mm on a CNC machining fixture to accommodate varying raw material thicknesses without manufacturing new stop collars.
Product Changeover Diverters
Adjust the extend stop on a packaging line diverter during format changeovers, allowing rapid reconfiguration for different package lengths while maintaining the original retract position.
Assembly Press Positioning
Set trial end positions on an assembly press to test part insertion depths, relying on the fixed elastomer bumper to decelerate the rod at the newly tuned extend endpoint.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-20SB the Right Cylinder?
Choosing this 40 mm bore provides 628.3 N push force at 0.5 MPa. If your application requires less force, stepping down to a 32 mm bore yields 402.1 N push, while moving up to a 50 mm bore provides 981.8 N push for heavier loads. A fixed-stroke ACQ cylinder is sufficient if your extend position never needs field adjustment. When ordering, confirm the 40 mm bore, 175 mm full stroke, 20 mm adjustment window, the -S magnet for electronic or reed switches, and the -B male M14x1.5 rod thread. Remember that a standard compact cylinder does not hold its load on air loss; specify an external rod lock or pilot-operated check valve if fail-safe holding is required.
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 ACQJ40X175-20SB FAQ
The usable extend range is 155-175 mm (a 175 mm full stroke with a 20 mm adjustment window). The force is identical to a standard ACQ of the same bore: 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.
An external M12x1.25 threaded stop with a lock nut limits the extend stroke only; the retract stroke is unaffected. Force remains unchanged because the piston area is not modified. The cylinder uses fixed NBR elastomer bumpers at both ends for deceleration rather than an adjustable air cushion. The included -S magnet works with both reed and electronic solid-state switches.
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Related AirTAC ACQJ Compact Cylinders
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