Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-75SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-75SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø32mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ32 mm
- Full stroke125 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-75SB
The ACQJ32X125-75SB is a double-acting JIS compact cylinder featuring a 125 mm total stroke and a 32 mm bore. Because this length exceeds the 100 mm standard maximum for this bore size, it is supplied as a made-to-order long-stroke variant. An external M12x1.25 threaded stop with a lock nut lets you fine-tune the extend end position on the machine itself, yielding a usable forward range of 50 to 125 mm without swapping components. The retract stroke remains completely unaffected.
Output force mirrors a standard ACQ of identical bore since the piston area is unchanged by the external adjuster. You receive 402.1 N of push and 301.6 N of pull at 0.5 MPa, peaking at 82 kgf maximum push at 1.0 MPa. This SB configuration includes a male M14x1.5 rod end for direct load coupling, a built-in piston magnet compatible with reed or solid-state switches, and fixed NBR elastomer bumpers at both ends for end-of-travel deceleration.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-75SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-75SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø32 mm |
| Full stroke | 125 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 302 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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 ACQJ32X125-75SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×125 | 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 ACQJ32X125-75SB Is Used
Machining Fixture Stops
Dial in the exact clamping extension on a CNC lathe to accommodate raw castings of varying widths without machining custom spacer blocks.
Packaging Changeover
Rapidly reposition a carton sealing head during product format changes by twisting the external stop to shorten the forward travel.
Assembly Press Trials
Safely test intermediate insertion depths for press-fit pins on an automated assembly line before locking the final end position down.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X125-75SB the Right Cylinder?
When sizing this unit, stepping down to a 25 mm bore yields 245.4 N push at 0.5 MPa, whereas stepping up to a 40 mm bore provides 628.3 N. If your equipment never requires altering the forward endpoint, a fixed-stroke ACQ cylinder will suffice and avoids the adjuster overhang. For this model, confirm the 32 mm bore, 125 mm total length, 75 mm adjustment window, the S magnet option, and the B male rod thread. Note that a plain compact cylinder drifts on air loss; utilize an external rod lock or pilot-operated check valve for fail-safe load holding.
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 ACQJ32X125-75SB FAQ
This 32 mm bore cylinder provides 402.1 N push and 301.6 N pull at 0.5 MPa, 562.9 N push at 0.7 MPa, and a maximum push of 82 kgf at 1.0 MPa. The full stroke is 125 mm, but the external stop allows you to shorten the extend stroke by up to 75 mm, creating a usable forward range of 50 to 125 mm.
No, the output force remains identical to a standard ACQ because the adjuster only limits how far the rod travels, not the piston area. Deceleration is handled by fixed NBR elastomer bumpers at both ends rather than adjustable air cushions, so you should slow the approach speed or add external shock absorbers for high-energy loads.
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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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