Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50SB 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 ACQJ40X70-50SB
The AirTAC ACQJ40X70-50SB is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend range from 20 mm up to the full 70 mm directly on your equipment without swapping parts, while the retract stroke remains completely unaffected. This unit includes a built-in piston magnet (-S) for position sensing and a male-thread piston rod end (-B, M14x1.5) that couples directly to your load.
Because the adjuster only alters travel length and not the piston area, the output force stays identical to a standard ACQ of the same bore. At 0.5 MPa, it delivers 628.3 N of push force and 527.8 N of pull force. The cylinder body features fixed elastomer bumpers at both ends for end-of-stroke deceleration and operates within a 0.15-1.0 MPa pressure range.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50SB |
|---|---|
| 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 ACQJ40X70-50SB
| 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 ACQJ40X70-50SB Is Used
Machining Fixture Stops
Dial in the exact extend position from 20 to 70 mm on the fly when clamping raw castings of varying widths in a CNC milling fixture.
Carton Changeover Pushers
Quickly reset the extend end point during a packaging line product changeover to accommodate different box dimensions without changing cylinders.
Assembly Press Trial
Safely test and step through multiple extend end positions on an electronic assembly press to find the optimal insertion depth for new components.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50SB the Right Cylinder?
Choosing this 40 mm bore provides a middle-ground solution between the 32 mm bore (402.1 N push @0.5 MPa) and the 50 mm bore (981.8 N push @0.5 MPa). If your application never requires end-position adjustments, a fixed-stroke ACQ cylinder will suffice. When ordering, verify the full stroke (70 mm), the adjustable window (50 mm), the required -S magnet for electronic or reed switches, and the -B male rod thread (M14x1.5) to ensure seamless integration.
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 ACQJ40X70-50SB FAQ
The usable extend range is 20-70 mm (full 70 mm stroke minus the 50 mm window). The force is identical to a standard ACQ bore 40: push is 628.3 N and pull is 527.8 N at 0.5 MPa, push is 879.6 N at 0.7 MPa, and the maximum push force is 128 kgf at 1.0 MPa.
The external M12x1.25 threaded stop with lock nut limits only the extend stroke length, leaving the retract stroke unaffected. Fixed elastomer bumpers handle deceleration at both ends. Note that this cylinder does not hold its load on air loss; for fail-safe holding, use an external rod lock or pilot-operated check valve.
Authorized Export Seller
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
Request a Quote for Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-50SB
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.