Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X70-20B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X70-20B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø32mm bore and 70mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ32 mm
- Full stroke70 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X70-20B
The AirTAC ACQJ32X70-20B is a double-acting, single-rod JIS compact cylinder with an external threaded stop and lock nut that limits the EXTEND end position. You can fine-tune the usable extend travel anywhere between 50 and 70 mm right on the machine without swapping parts. The RETRACT stroke remains unaffected. An external M12x1.25 adjuster screw sets the exact limit.
Because the piston area stays the same, the output force is identical to a standard ACQ of this bore. This 32 mm bore unit features a 16 mm rod, PT1/8 porting, and a male M14x1.5 rod-end thread (-B) that couples directly to your load. It includes fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration and operates at speeds from 30 to 500 mm/s.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X70-20B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X70-20B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø32 mm |
| Full stroke | 70 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 ACQJ32X70-20B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×70 | 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 ACQJ32X70-20B Is Used
Machining Fixture Stops
Dial in the exact extend position between 50 and 70 mm on a CNC machining fixture to accommodate different raw material lengths without machining custom spacers.
Packaging Changeover
Adjust the extend stroke on the fly during packaging line product changeovers to hit new carton folding depths rapidly and keep downtime minimal.
Lab Test Positioning
Iteratively set trial end positions for material compression testing equipment, allowing researchers to find the exact contact depth without recalculating pneumatic travel.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ32X70-20B the Right Cylinder?
If 402.1 N push force at 0.5 MPa is too high, consider the ACQJ25 option which yields 245.4 N, or step up to the ACQJ40 providing 628.3 N if your application requires more power. If your process never requires varying the end position, a fixed-stroke ACQ cylinder will suffice. When ordering this adjustable version, confirm the 32 mm bore, 70 mm full stroke, 20 mm adjuster window, the -B male rod thread, and note this unit ships without a magnet (-S) for position sensing.
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 ACQJ32X70-20B FAQ
The push force is 402.1 N and pull is 301.6 N at 0.5 MPa, with a push of 562.9 N at 0.7 MPa and a maximum push of 82 kgf at 1.0 MPa. The usable extend range is 50 to 70 mm, set via a 20 mm adjustment window, while the retract stroke remains fixed.
No, the external M12x1.25 threaded stop only changes the extend stroke length, not the piston area, so force is identical to a standard ACQ. The cylinder uses fixed NBR elastomer bumpers at both ends for deceleration rather than an adjustable air cushion. Note that a plain ACQ-type does not hold its load on air loss; use an external rod lock for fail-safe holding.
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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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