Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-40
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-40 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 ACQJ40X175-40
The AirTAC ACQJ40X175-40 is a double-acting, single-rod JIS compact cylinder built for applications requiring variable extend end positions. It features an external threaded stop with a lock nut on the rod-end side, allowing you to fine-tune the extend travel anywhere within a 135 to 175 mm usable range. Because the piston area remains constant, the output force is identical to a standard ACQ of the same bore, delivering 628.3 N of push force at 0.5 MPa. Retract stroke length is not affected by the adjuster.
This unit is a long-stroke variant, as the 175 mm stroke exceeds the 100 mm standard maximum for a bore 40 cylinder, making it a made-to-order component. It incorporates a fixed NBR elastomer bumper at each end to decelerate the piston near stroke extremes, rather than relying on an adjustable air cushion. The body includes standard magnetic-switch grooves, though this specific configuration ships without a magnet. Operating pressure spans 0.15 to 1.0 MPa, and the piston rod measures 16 mm in diameter with an M8x1.25 female thread end.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-40 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-40 |
|---|---|
| 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 ACQJ40X175-40
| 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 ACQJ40X175-40 Is Used
Machining Center Changeover
Ideal for CNC pallet changers needing rapid product-changeover stops, allowing operators to dial in the exact extend position for different fixture heights without swapping cylinders.
Variable Carton Sealing
Provides trial end positions on packaging lines handling mixed box sizes, letting the stroke be shortened by up to 40 mm to accommodate varying flap heights on the fly.
Assembly Press Tonnage
Used in light assembly presses where the extend reach must be tweaked during setup-varying fixture runs, ensuring the 879.6 N @0.7 MPa force hits the target without overtravel.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-40 the Right Cylinder?
When sizing this actuator, consider the neighbouring bores: a bore 32 yields 402.1 N push at 0.5 MPa, while a bore 50 provides 981.8 N. The 40 mm bore here supplies a middle-ground 628.3 N push and 527.8 N pull at 0.5 MPa, with a maximum push of 128 kgf at 1.0 MPa. If your extend endpoint never varies, a fixed-stroke ACQ cylinder is sufficient and more economical. To order this adjustable variant correctly, confirm the 40 mm bore, 175 mm full stroke, 40 mm adjustment window, and the default female rod thread. Note that a plain ACQ-type cylinder will not hold its load on air loss or a centered valve; the rod drifts, and the fixed bumper only decelerates near the stroke end. For a fail-safe hold, specify an external rod lock or a pilot-operated check valve.
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 ACQJ40X175-40 FAQ
The usable extend range is 135 to 175 mm (a 175 mm full stroke minus up to a 40 mm window). It delivers 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. The piston rod is 16 mm, the port is PT1/8, and the external adjuster thread is M12x1.25.
No, the external threaded stop only changes the extend stroke length, not the piston area, so the force remains identical to a standard ACQ. Deceleration is handled by a fixed NBR elastomer bumper at each end rather than an adjustable air cushion; for high-speed or high-energy loads, add an external shock absorber or slow the approach.
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Related AirTAC ACQJ Compact Cylinders
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