Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke300 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75
The AirTAC ACQJ40X300-75 is a double-acting, single-rod JIS compact cylinder engineered as a long-stroke, made-to-order variant. It features an external threaded stop with a lock nut on the extend side, allowing you to fine-tune the usable extend range from 225 mm up to the full 300 mm directly on your equipment. The retract stroke remains completely unaffected by this adjustment.
Because the piston area is unchanged, output force stays identical to a standard ACQ of the same bore, delivering 628.3 N push and 527.8 N pull at 0.5 MPa. The unit incorporates a fixed NBR elastomer bumper at each end for end-of-stroke deceleration and features sensor grooves, though this specific configuration ships without a magnet. Operating pressure spans 0.15 to 1.0 MPa.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 300 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 ACQJ40X300-75
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 ACQJ40X300-75 Is Used
Multi-Part Machining Fixtures
Dial in the extend stop from 225 to 300 mm when changing part depths on a CNC lathe, avoiding custom spacer rings.
Packaging Line Changeover
Adjust the pusher end position on the fly to accommodate varying carton sizes without swapping out the entire actuator assembly.
Assembly Press Trials
Test multiple engagement depths on an automated press, relying on the fixed NBR bumper to absorb the 879.6 N force at 0.7 MPa.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-75 the Right Cylinder?
When sizing this unit, consider the 628.3 N push force at 0.5 MPa; if your application requires less thrust, the ACQJ32 bore offers 402.1 N, while stepping up to the ACQJ50 yields 981.8 N. If exact end-position tuning is unnecessary, a fixed-stroke ACQ cylinder will suffice. For ordering, confirm the 40 mm bore, 300 mm full stroke, 75 mm adjustable window, female rod-end thread (M8x1.25), and the absence of a magnet. Remember that a plain compact cylinder does not hold its load on air loss; for fail-safe holding, specify an external rod lock or pilot-operated check valve.
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 ACQJ40X300-75 FAQ
It provides 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 full stroke is 300 mm, but the external M12x1.25 adjuster allows you to shorten the extend stroke by up to 75 mm, yielding a usable extend range of 225-300 mm.
No, the force remains identical to a standard ACQ because the adjuster only limits travel, not piston area. Deceleration is handled by a fixed elastomer bumper at each end, not an adjustable air cushion; for high-speed or high-energy loads, add an external shock absorber or slow the approach.
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 ACQJ40X300-75
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.