Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30S 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 ACQJ40X70-30S
The AirTAC ACQJ40X70-30S is a double-acting JIS compact cylinder with a 40mm bore and a 70mm full stroke. An external threaded stop with a lock nut limits the extend end position, providing a usable forward range of 40 to 70mm. You can fine-tune the forward endpoint directly on the machine without swapping parts, while the retract stroke remains completely unaffected.
Because the adjustment only alters travel length and not piston area, output force is identical to a standard ACQ of this size. The unit pushes 628.3N and pulls 527.8N at 0.5MPa. It features a 16mm piston rod, an M8x1.25 female rod-end thread, and a PT1/8 port. Fixed NBR elastomer bumpers handle end-of-stroke deceleration, and the built-in magnet (-S) supports both reed and solid-state sensors.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30S |
|---|---|
| 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 ACQJ40X70-30S
| 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 ACQJ40X70-30S Is Used
Machining Fixture Stops
Dial in the exact clamping reach on CNC fixtures. The external stop allows operators to shift the extend endpoint by up to 30mm when transitioning between raw material thicknesses.
Product Changeover Guides
Adapt sorting or diverting gates on a packaging line. The adjustable forward stop lets you reposition the rod end rapidly for different carton sizes without changing the cylinder body.
Assembly Press Tonnage
Set trial end positions for pressing bearings or pins. The lock nut secures the 40 to 70mm forward travel, ensuring the 628.3N push force hits the target depth consistently.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-30S the Right Cylinder?
When sizing this 40mm bore actuator, consider the adjacent options: a 32mm bore yields 402.1N push, whereas a 50mm bore provides 981.8N at 0.5MPa. If your setup never requires end-position adjustments, a fixed-stroke ACQ cylinder provides the exact same power in a simpler package. To order this adjustable version, confirm the 40mm bore, 70mm full stroke, 30mm window, the -S magnet, and your required rod-end thread type.
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 ACQJ40X70-30S FAQ
This 40mm bore cylinder delivers a push force of 628.3N and a pull force of 527.8N at 0.5MPa, with a push of 879.6N at 0.7MPa. The maximum push is 128kgf at 1.0MPa. The full stroke is 70mm, but the external adjuster allows you to shorten the extend stroke by up to 30mm, creating a usable forward range of 40 to 70mm.
The adjuster uses an M12x1.25 threaded stop with a lock nut to mechanically limit how far the rod extends, without changing the piston area or reducing the output force. Deceleration is handled by fixed NBR elastomer bumpers at both ends, not adjustable air cushions. The included -S magnet works seamlessly with both reed and electronic solid-state switches.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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