Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-50SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-50SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke75 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-50SB
The AirTAC ACQJ40X75-50SB is a double-acting JIS compact cylinder featuring a 40mm bore and a 75mm full stroke. Equipped with a male piston rod end (M14x1.5) and an integrated magnet (-S), it uses an external M12x1.25 threaded stop with a lock nut to restrict the forward extension. You can fine-tune the extend end position directly on the machine within a 25 to 75mm usable range, while the retract stroke remains completely unaffected.
Because the adjuster only alters travel length and not the piston area, the output force matches a standard ACQ exactly, delivering 628.3N push and 527.8N pull at 0.5MPa. The cylinder body relies on fixed elastomer NBR bumpers at both ends for deceleration rather than adjustable air cushions. It operates at 30-500mm/s, handles pressures from 0.15 to 1.0MPa, and includes sensor grooves compatible with both reed and solid-state magnetic switches.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-50SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-50SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 75 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 ACQJ40X75-50SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 ACQJ40X75-50SB Is Used
Machining Fixture Clamps
Dial in the exact clamping extension on CNC fixtures during part changeovers without machining new stop spacers.
Carton Sealing Heads
Modify the folding arm reach on packaging lines to accommodate varying box heights rapidly on the fly.
Bending Press Stops
Set precise material bend depths by limiting the extend stroke, allowing quick trial positions on the press.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-50SB the Right Cylinder?
Selecting this 40mm bore provides a maximum push force of 128kgf at 1.0MPa. When sizing, note the neighboring options: a 32mm bore yields 402.1N push at 0.5MPa, whereas a 50mm bore yields 981.8N. If your application never requires end-position shifts, a fixed-stroke ACQ cylinder is sufficient. To order this adjustable version correctly, confirm the 40mm bore, 75mm full stroke, 50mm window, -S magnet for switch tracking, and -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 ACQJ40X75-50SB FAQ
At 0.5MPa it provides 628.3N push and 527.8N pull; at 0.7MPa push is 879.6N. Maximum push is 128kgf at 1.0MPa. The 75mm full stroke has a 50mm window, yielding a usable extend range of 25-75mm.
No, the external M12x1.25 stop changes only the extend travel length, so force remains identical to a standard ACQ. Note that a plain compact cylinder does not hold its load on air loss; for fail-safe holding, use an external rod lock or pilot-operated check valve.
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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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