Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke125 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50B
The AirTAC ACQJ40X125-50B is a double-acting, single-rod JIS compact cylinder built for applications requiring variable extend end positions. It features an external threaded stop with a lock nut that permits on-machine stroke tuning without swapping components. You can shorten the extend travel by up to 50 mm, yielding a usable forward range of 75 to 125 mm from the 125 mm full stroke, while the retract distance remains completely unaffected. This specific configuration is a long-stroke, made-to-order variant, as 125 mm exceeds the 100 mm standard maximum for this bore size.
Because the adjuster restricts travel length without altering the piston area, the output force is identical to a standard ACQ of the same bore. At 0.5 MPa you get 628.3 N of push force and 527.8 N of pull force. The Ø16 mm rod terminates in a male M14x1.5 thread for direct load coupling, and the body incorporates sensor grooves. Deceleration is handled by a fixed NBR elastomer bumper at each end rather than an adjustable air cushion.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 125 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 ACQJ40X125-50B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 ACQJ40X125-50B Is Used
Product Changeover Stops
Quickly dial in a new extended end position on packaging lines when switching to a different package format, using the external M12x1.25 adjuster to hit the new dimension precisely.
Trial End Positions
Fine-tune the forward stroke during laboratory or machine prototyping to test clamping pressure or engagement depth without machining new spacers or ordering replacement parts.
Setup-Varying Fixtures
Adapt a single fixture to multiple part heights by shortening the extend travel by up to 50 mm, ensuring proper contact force across a family of similar components.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-50B the Right Cylinder?
When sizing this actuator, consider the 628.3 N push force at 0.5 MPa against your actual load. If your project requires slightly less thrust, the adjacent ACQJ32 bore provides 402.1 N of push force, whereas stepping up to an ACQJ50 yields 981.8 N. If the end position never varies, a fixed-stroke ACQ cylinder will accomplish the same task more economically. For this adjustable model, confirm your ordering essentials: 40 mm bore, 125 mm full stroke, 50 mm window, the male M14x1.5 rod thread, and whether you need a magnet for position sensing.
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 ACQJ40X125-50B 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 125 mm, and the adjustable window is 50 mm, giving a usable extend range of 75 to 125 mm.
The external stop uses an M12x1.25 threaded screw with a lock nut to mechanically limit how far the rod extends, shortening the forward travel only. It does not change the piston area, so force remains identical to a standard ACQ. The retract stroke is unaffected, and a fixed elastomer bumper handles end-of-stroke deceleration.
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 ACQJ40X125-50B
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.