Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-50B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-50B 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 ACQJ40X75-50B
The AirTAC ACQJ40X75-50B is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You can fine-tune the usable extend range from 25 mm up to the full 75 mm on your machine without changing parts, while the retract stroke remains completely unaffected.
Because the piston area stays standard, output force is identical to a regular ACQ of this bore, delivering 628.3 N push at 0.5 MPa. This specific variant includes a male M14x1.5 rod-end thread for direct load coupling, a PT1/8 port, and fixed elastomer bumpers at both ends. Note that this unit ships without a sensor magnet, though the body retains magnetic-switch grooves for future upgrades.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-50B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-50B |
|---|---|
| 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 ACQJ40X75-50B
| 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 ACQJ40X75-50B Is Used
Machine Tending Setup
Dial in the exact extend stop during initial commissioning of a CNC lathe loader without machining custom spacers.
Product Changeover Stops
Shift the extend position rapidly on a packaging line when switching between different carton depths.
Assembly Fixture Clamping
Test various clamping depths on an aluminum welding fixture to find the optimal crush before finalizing the design.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X75-50B the Right Cylinder?
When sizing this 40 mm bore actuator, consider the neighbouring bores: a 32 mm unit yields 402.1 N push, whereas a 50 mm provides 981.8 N at 0.5 MPa. If your extend endpoint never varies, a fixed-stroke ACQ cylinder is sufficient. To order this adjustable version correctly, confirm the 40 mm bore, 75 mm full stroke, 50 mm window, the male rod thread (-B), and note that the magnet (-S) is omitted here.
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 ACQJ40X75-50B FAQ
This 40 mm bore cylinder delivers 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 50 mm adjustable window allows the extend stroke to be shortened from 75 mm down to 25 mm.
An M12x1.25 threaded stop with a lock nut mechanically limits the extend length, meaning force stays identical to a standard ACQ since piston area is unchanged. The cylinder uses fixed elastomer bumpers for end-of-stroke deceleration and will not hold its load on air loss, so an external rod lock is needed for fail-safe holding.
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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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