Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke125 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10SB
The ACQJ40X125-10SB is a double-acting, single-rod JIS compact cylinder built for applications requiring on-the-fly extend position tuning. It features an external M12x1.25 threaded stop with a lock nut that shortens the forward stroke by up to 10 mm, yielding a usable extend range of 115 to 125 mm. The retract stroke remains completely unaffected. Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore.
This specific configuration is a long-stroke, made-to-order variant, as the 125 mm stroke exceeds the 100 mm standard maximum for a 40 mm bore. It includes a built-in piston magnet (-S) compatible with reed or electronic solid-state switches, and a male M14x1.5 rod-end thread (-B) for direct load coupling. The unit relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 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 (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 ACQJ40X125-10SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | 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 ACQJ40X125-10SB Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC milling fixture without machining custom spacers, accommodating various raw part lengths.
Packaging Changeover
Swiftly alter the carton sealing head height during product format transitions on a packaging line to maintain precise sealing depth.
Prototype Positioning
Establish the ideal end-of-stroke location for a new assembly station during R&D trials, locking the final position with the adjuster nut.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10SB the Right Cylinder?
When sizing this actuator, note the 628.3 N push and 527.8 N pull forces at 0.5 MPa. If your application requires less force, stepping down to a 32 mm bore provides a 402.1 N push, while moving up to a 50 mm bore yields 981.8 N of push force. If the end position never varies, a fixed-stroke ACQ cylinder will suffice. To order this adjustable variant correctly, confirm the 40 mm bore, the 125 mm full stroke, the 10 mm adjustment window, the -S magnet option, and the -B male rod thread.
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 ACQJ40X125-10SB FAQ
This cylinder has a 125 mm full stroke with a 10 mm adjustable window, giving a usable extend range of 115-125 mm. The output force is identical to a standard ACQ: 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 external M12x1.25 threaded stop with a lock nut limits the extend distance without altering the piston area, meaning force is unchanged. The retract stroke is unaffected. Deceleration relies on a fixed elastomer bumper, not an adjustable air cushion. Note that this plain cylinder does not hold its load on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
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Related AirTAC ACQJ Compact Cylinders
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