Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-20
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-20 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 ACQJ40X175-20
The ACQJ40X175-20 is a double-acting JIS compact cylinder engineered for applications requiring precise extend positioning. It features an external M12x1.25 threaded stop with a lock nut, allowing you to fine-tune the extend stroke on the machine without swapping parts. The usable extend range spans 155 to 175 mm, while the retract stroke remains completely unaffected. This unit is a long-stroke, made-to-order variant, as the 175 mm stroke exceeds the 100 mm standard maximum for this 40 mm bore.
Because the adjuster only limits travel length and not piston area, output force remains identical to a standard ACQ of the same bore. You get 628.3 N of push and 527.8 N of pull at 0.5 MPa. The body incorporates a fixed NBR elastomer bumper at each end for end-of-stroke deceleration and includes magnetic-switch grooves, though this specific configuration ships without a magnet. Operating pressure ranges from 0.15 to 1.0 MPa, with a PT1/8 port and a 16 mm rod.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-20 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-20 |
|---|---|
| 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 ACQJ40X175-20
| 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 ACQJ40X175-20 Is Used
Variable Length Stop Gauging
Ideal for machining cells where a 40 mm bore pin must push parts to varying depths between 155 and 175 mm based on the specific workpiece fixture installed.
Packaging Format Changeover
Enables rapid mechanical adjustment of the extend end position during product family transitions on a filling line, avoiding software reprogramming or cylinder swapping.
Long-Stroke Assembly Pressing
Provides a 175 mm travel envelope for reaching into deep machine cavities, using the external stop to dial in the exact final pressing force against a component.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X175-20 the Right Cylinder?
When sizing this actuator, consider the next smaller bore (32 mm yields 402.1 N push at 0.5 MPa) if your load is lighter, or the next larger bore (50 mm yields 981.8 N push) if you need greater thrust. If the exact 175 mm extend length is constant and never requires tweaking, a fixed-stroke ACQ cylinder will suffice and simplify your setup. For ordering, confirm the 40 mm bore, 175 mm full stroke, 20 mm adjuster window, female M8x1.25 rod-end thread, and whether you require the -S magnet option for position sensing. Note that a plain compact cylinder will drift and lose its load upon air loss; for fail-safe holding, integrate an external rod lock or 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 ACQJ40X175-20 FAQ
This 40 mm bore cylinder 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 full stroke is 175 mm, but the external adjuster provides a 20 mm window, allowing the usable extend range to be set anywhere from 155 to 175 mm.
The external M12x1.25 threaded stop physically blocks the rod from extending further, shortening the stroke length without changing the piston area, so force remains identical to a standard ACQ. Deceleration is handled by fixed NBR elastomer bumpers at both ends rather than adjustable air cushions; for high kinetic energy loads, you should add an external shock absorber.
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Related AirTAC ACQJ Compact Cylinders
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