Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø32mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ32 mm
- Full stroke250 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-20SB
The ACQJ32X250-20SB is a double-acting, single-rod JIS compact cylinder engineered for applications requiring precise on-machine extend positioning. It features an external M12x1.25 threaded stop with a lock nut that limits the outward stroke, allowing you to fine-tune the end position within a 230 to 250 mm usable range without swapping parts. The retract stroke remains completely unaffected. Equipped with a male M14x1.5 piston rod (-B) and a built-in magnet (-S), it couples directly to loads and integrates seamlessly with reed or solid-state magnetic switches.
This variant is a made-to-order long-stroke unit, as the 250 mm travel exceeds the 100 mm standard maximum for a 32 mm bore. Because the adjuster alters stroke length only, the piston area stays constant, meaning force output is identical to a standard ACQ of this size. You can expect 402.1 N of push force and 301.6 N of pull force at 0.5 MPa. The unit relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion, and it operates efficiently between 30 and 500 mm/s.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø32 mm |
| Full stroke | 250 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 ACQJ32X250-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×250 | 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 ACQJ32X250-20SB Is Used
Machining Fixture Stops
Dial in the exact 230 to 250 mm extend position on CNC machining fixtures to accommodate raw material thickness variations without disassembling the pneumatic setup.
Product Changeover Gates
Rapidly reposition diverter gates on packaging lines during format changes by turning the M12x1.25 external stopper to meet new carton dimensions.
Prototype Press Testing
Safely test trial end positions on prototype assembly presses by shortening the stroke incrementally, preventing crashes before finalizing the mechanical hard stop.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X250-20SB the Right Cylinder?
When sizing this actuator, consider the neighbouring bores: a 25 mm bore yields 245.4 N push at 0.5 MPa, while a 40 mm bore provides 628.3 N. The 32 mm bore here offers 402.1 N push and 301.6 N pull at 0.5 MPa, making it a solid middle ground. If your extend position never varies, a fixed-stroke ACQ cylinder suffices and avoids the external adjuster overhang. For this model, confirm the 250 mm full stroke, the 20 mm adjustment window, the -S magnet for switch readiness, and the -B male M14x1.5 rod thread. Note that a standard ACQ will drift on air loss; pair this cylinder with an external rod lock if you need 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 ACQJ32X250-20SB FAQ
This 32 mm bore cylinder has a 250 mm full stroke with a 20 mm adjustable window, yielding a usable extend range of 230 to 250 mm. Force is identical to a standard ACQ: 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.
An external M12x1.25 threaded stop with a lock nut limits the extend stroke without changing the piston area, so force remains constant. The retract stroke is unaffected. Deceleration is handled by a fixed NBR elastomer bumper at each end, not an adjustable air cushion. The -S magnet allows tracking with reed or electronic switches.
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Related AirTAC ACQJ Compact Cylinders
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