Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40B 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 ACQJ40X70-40B
The AirTAC ACQJ40X70-40B is a double-acting JIS compact cylinder featuring a 70mm full stroke and an external M12x1.25 threaded stop with a lock nut. This mechanism lets you fine-tune the extend end position on the machine, providing a usable forward travel range of 30 to 70mm. The return stroke remains completely unaffected by this adjustment. Because the piston area stays constant, output thrust equals a standard ACQ unit of the same bore, yielding 628.3N push at 0.5MPa.
Equipped with a male M14x1.5 rod end, it couples directly to your payload. The body incorporates integrated magnetic-switch grooves, though this specific configuration ships without a magnet. Deceleration relies on a fixed NBR elastomer bumper at each end rather than an adjustable air cushion. Operating pressure spans 0.15 to 1.0MPa, with a proof rating of 1.5MPa, while cycle speeds of 30-500mm/s are supported.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40B |
|---|---|
| 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 ACQJ40X70-40B
| 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 ACQJ40X70-40B Is Used
Machining Clamp Tuning
Dial in the exact clamping reach on a CNC fixture by turning the external stop, accommodating different part heights without swapping cylinders.
Packaging Changeover
Rapidly adjust the extend length to match new carton dimensions on a packaging line, using the lock nut to secure the new 30-70mm position.
Assembly Press Setup
Establish trial end positions for pressing bearings, allowing operators to find the perfect seating depth on the machine floor without custom spacers.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40B the Right Cylinder?
If your application needs less thrust, the ACQJ32 bore provides 402.1N push at 0.5MPa, whereas stepping up to the ACQJ50 yields 981.8N. For this 40mm bore, the maximum standard full stroke is 100mm. Choose this specific 70-40 variant when your fixture setup requires variable end positions within a 30 to 70mm window. If a fixed forward distance is always required, a standard ACQ cylinder will suffice. Confirm your ordering essentials: 40mm bore, 70mm full stroke, 40mm adjuster window, male M14x1.5 rod thread, and no magnet.
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 ACQJ40X70-40B FAQ
The usable extend range is 30-70mm (70mm full stroke minus the 40mm window). Force is identical to a standard ACQ: 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa.
An external M12x1.25 threaded screw with a lock nut limits the forward travel distance without altering piston area, so thrust remains unchanged. Deceleration uses a fixed NBR elastomer bumper, not an adjustable air cushion. This plain cylinder does not hold its load on air loss; use an external rod lock for fail-safe positioning.
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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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