Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30SB 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 ACQJ40X70-30SB
The AirTAC ACQJ40X70-30SB is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You get a usable extend range of 40 to 70 mm because the 30 mm adjustment window shortens the 70 mm full stroke. The retract stroke remains completely unaffected.
Output force stays identical to a standard ACQ bore 40 cylinder since the piston area is unchanged, yielding 628.3 N push and 527.8 N pull at 0.5 MPa. This SB configuration includes a male M14x1.5 piston rod end for direct load coupling, a built-in magnet for electronic or reed switches, and fixed NBR elastomer bumpers at both ends.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30SB |
|---|---|
| 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 ACQJ40X70-30SB
| 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 ACQJ40X70-30SB Is Used
Machining Fixture Stops
Dial in the exact 40 to 70 mm extend position during CNC changeovers to accommodate varying raw material lengths without swapping cylinder hardware.
Carton Sealing Adjustments
Modify the extend stroke on packaging lines to match different box heights on the fly, ensuring consistent flap closure pressure.
Assembly Press Positioning
Set trial end positions on automated assembly presses to find the optimal contact point for pressing bearings without reprogramming the PLC.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30SB the Right Cylinder?
Comparing neighbouring bores, the 32 mm version provides 402.1 N push while the 50 mm offers 981.8 N push at 0.5 MPa, making this 40 mm bore ideal for medium-duty tasks requiring 628.3 N push. If your machinery never requires end-position tuning, a fixed-stroke ACQ cylinder will suffice. When ordering this adjustable unit, confirm the 40 mm bore, 70 mm full stroke, 30 mm window, the S magnet, 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 ACQJ40X70-30SB FAQ
It provides 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 full stroke is 70 mm with a 30 mm adjustment window, giving a usable extend range of 40 to 70 mm.
The external M12x1.25 threaded stop changes only the extend stroke length, meaning force remains identical to a standard ACQ. Deceleration is handled by fixed NBR elastomer bumpers at each end rather than an adjustable air cushion, so you should slow high-energy approaches or add external shock absorbers.
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1-Year Warranty
Covers non-human-caused product damage.
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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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