Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-40B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-40B 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 ACQJ40X175-40B
The ACQJ40X175-40B is a double-acting JIS compact cylinder with a 40mm bore and a 175mm full stroke. Because this is a long-stroke variant exceeding the 100mm standard maximum for this bore size, it is produced as a made-to-order unit within the 300mm long-stroke range. An external M12x1.25 threaded stop and lock nut restricts the extend end position, providing a usable extend range of 135 to 175mm. The retract stroke remains completely unaffected by this adjustment.
Output force is identical to a standard ACQ of the same bore, as the adjuster only alters travel length without changing the piston area. At 0.5MPa, the push force is 628.3N and the pull force is 527.8N. This unit includes a male M14x1.5 threaded rod end for direct load coupling, a fixed NBR elastomer bumper at each end for end-of-stroke deceleration, and a PT1/8 port. It ships without a piston magnet, though the body retains sensor grooves for adding external switches.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-40B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-40B |
|---|---|
| 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 ACQJ40X175-40B
| 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 ACQJ40X175-40B Is Used
Fixture Position Tuning
Dial in the exact extend stop on machining fixtures during prototype runs without machining new spacers or swapping cylinders.
Product Changeover Stops
Adjust the extend position on packaging conveyor diverter arms to accommodate varying carton lengths rapidly.
Assembly Press End-Point
Set precise travel limits on an assembly press for trial end positions before finalizing the mechanical hard stop.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-40B the Right Cylinder?
When sizing this 40mm bore actuator, stepping down to a 32mm bore yields 402.1N push at 0.5MPa, while stepping up to a 50mm bore provides 981.8N push at 0.5MPa. If your application requires a fixed end position with no on-machine variation, a standard ACQ cylinder without the external stop would suffice. To order, confirm the 40mm bore, 175mm full stroke, 40mm adjustable window, the male rod thread (-B), and note the absence of the magnet option. For load holding under air loss, specify an external rod lock or pilot-operated check valve, as the fixed bumper alone will not prevent drift.
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 ACQJ40X175-40B FAQ
The usable extend range is 135-175mm (175mm full stroke minus the 40mm window). The force is unchanged from a standard ACQ: 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 external M12x1.25 threaded stop limits the extend travel without altering the piston area, so force remains identical to a standard ACQ. Deceleration is handled by a fixed NBR elastomer bumper, not an adjustable air cushion. A plain ACQ-type does not hold its load on air loss, so an external rod lock or pilot-operated check valve is recommended for fail-safe holding.
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Related AirTAC ACQJ Compact Cylinders
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