Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 70mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke70 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75SB
The AirTAC ACQJ40X70-75SB is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. With a full stroke of 70mm and an adjustment window of 75mm, you can fine-tune the usable extend range from 0mm up to 70mm directly on your machinery. The retract stroke remains completely unaffected by this mechanism.
Because the internal piston area is unchanged, output force is identical to a standard ACQ of the same bore, delivering 628.3N push and 527.8N pull at 0.5 MPa. This unit includes a male M14x1.5 rod end (B) for direct load coupling, a built-in magnet (S) for position sensing, and fixed NBR elastomer bumpers at both ends. Operating pressure ranges from 0.15 to 1.0 MPa.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 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 (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 ACQJ40X70-75SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | 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 ACQJ40X70-75SB Is Used
Machining Fixture Stops
Dial in the exact clamping extension on CNC machining fixtures without machining new spacer blocks when part dimensions change.
Packaging Changeover
Rapidly adjust the pushing end position on packaging lines to accommodate different carton lengths during product format changeovers.
Assembly Press Tonnage
Set trial end positions on automated assembly presses to prevent overtravel and precisely control component seating depth.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-75SB the Right Cylinder?
Selecting this bore provides 628.3N push at 0.5 MPa, sitting between the 32mm bore (402.1N push) and the 50mm bore (981.8N push). If your extend endpoint never varies, a fixed-stroke ACQ cylinder is sufficient. For this adjustable model, confirm your ordering essentials: 40mm bore, 70mm full stroke, 75mm window, S magnet, and B male rod thread. Note that a plain ACQ-type does not hold its load on air loss; for fail-safe holding, specify an external rod lock or pilot-operated check valve.
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 ACQJ40X70-75SB FAQ
Force is identical to a standard ACQ: push is 628.3N and pull is 527.8N at 0.5 MPa, push is 879.6N at 0.7 MPa, and max push is 128 kgf at 1.0 MPa. The usable extend range is 0-70mm because the full 70mm stroke has a 75mm adjustment window. The retract stroke is unaffected.
An external M12x1.25 threaded stop with a lock nut mechanically limits how far the rod extends, changing only the stroke length, not the force. Deceleration relies on fixed elastomer bumpers, not adjustable air cushions. The built-in magnet works with reed or electronic solid-state switches for position detection.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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