Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø32mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ32 mm
- Full stroke40 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20SB
The AirTAC ACQJ32X40-20SB is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You can fine-tune the usable extend travel from 20mm up to the full 40mm directly on the machine without swapping components, while the retract stroke remains unaffected. It incorporates a male M14x1.5 piston rod end for direct load coupling and a built-in piston magnet for position sensing.
Because the piston area is unchanged, the output force is identical to a standard ACQ of the same bore, delivering 402.1N push and 301.6N pull at 0.5MPa. The cylinder body uses a fixed elastomer NBR bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. It operates at 30-500mm/s and includes a PT1/8 port.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø32 mm |
| Full stroke | 40 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 ACQJ32X40-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×40 | 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 ACQJ32X40-20SB Is Used
Machining Fixture Clamping
Dial in the exact clamping reach on a machining center during setup, shortening the extend travel from 40mm down to 20mm to accommodate varying raw material thicknesses without fabricating new spacer blocks.
Carton Sealing Turrets
Adjust the flap-folding or sealing head position on the fly during product changeover, using the external M12x1.25 stopper nut to set precise end positions for different package dimensions.
Assembly Line Stops
Set and lock trial end positions for part-diverter mechanisms on a conveyor, allowing operators to tweak the extend endpoint on-site to perfectly align with downstream handling equipment.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X40-20SB the Right Cylinder?
If your application only requires a fixed 40mm extend stroke, a standard ACQ32 cylinder will suffice without the external adjuster hardware. If you need higher force, stepping up to a 40mm bore yields 628.3N push at 0.5MPa; dropping to a 25mm bore reduces push to 245.4N. For this ACQJ32X40-20SB configuration, verify your ordering essentials: 32mm bore, 40mm full stroke, 20mm adjustable window, -S magnet for electronic or reed switches, and -B male M14x1.5 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 ACQJ32X40-20SB FAQ
The usable extend range is 20-40mm (a 40mm full stroke minus up to a 20mm adjustable window). The output force is identical to a standard ACQ: push is 402.1N and pull is 301.6N at 0.5MPa, push is 562.9N at 0.7MPa, and maximum push is 82kgf at 1.0MPa.
An external M12x1.25 threaded stop with a lock nut mechanically limits the extend travel, leaving the retract stroke unaffected. It does not alter the piston area, so force remains unchanged. The cylinder relies on a fixed elastomer bumper for deceleration, not an adjustable air cushion, and it will not hold a 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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