Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-40SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-40SB 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 ACQJ40X125-40SB
The ACQJ40X125-40SB is a double-acting JIS compact cylinder engineered for adaptable extend positioning. It features an external M12x1.25 threaded stop with a lock nut, allowing you to trim the forward stroke anywhere between 85 and 125 mm directly on your equipment. The return stroke remains completely unaffected. Because the piston area stays constant, output force matches a standard ACQ exactly, delivering 628.3 N push and 527.8 N pull at 0.5 MPa.
This unit includes a male M14x1.5 rod end for direct load coupling and an integrated magnet (-S) for electronic or reed sensing. As a long-stroke made-to-order variant exceeding the 100 mm standard maximum for this bore, it relies on fixed NBR elastomer bumpers for end-of-travel deceleration. Operating pressure spans 0.15 to 1.0 MPa, with a PT1/8 port managing the pneumatic supply.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-40SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-40SB |
|---|---|
| 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 ACQJ40X125-40SB
| 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 ACQJ40X125-40SB Is Used
Variable Length Stopper Pins
Adjusting the extend stop on a packaging conveyor lets operators change where cartons halt, accommodating varied box sizes without swapping out the actuator body.
CNC Fixture Probing
Dial in the exact clamping reach during prototype machining on a milling center, using the 85-125 mm window to test end positions before finalizing the setup.
Product Changeover Diverter
Fine-tune the pusher depth on a sorting line to deflect different product heights, relying on the fixed elastomer bumper to absorb the impact at high cycle rates.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-40SB the Right Cylinder?
When sizing this actuator, compare your thrust needs against neighboring bores: a 32 mm bore yields 402.1 N push at 0.5 MPa, while a 50 mm bore provides 981.8 N. This 40 mm model hits a solid middle ground at 628.3 N. If your equipment never requires end-position fine-tuning, a fixed-stroke ACQ will suffice and cost less. For ordering, confirm the 40 mm bore, 125 mm full stroke, 40 mm adjustment window, the -S magnet, and the -B male rod thread. Remember that a plain compact cylinder drifts if air pressure drops; add an external rod lock for fail-safe load holding.
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 ACQJ40X125-40SB FAQ
This 40 mm bore cylinder 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 usable extend range spans 85 to 125 mm, achieved by shortening the full 125 mm stroke by up to a 40 mm window.
An external M12x1.25 threaded screw with a lock nut mechanically limits how far the rod extends, shortening the forward stroke without altering piston area, so force remains identical to a standard ACQ. The retract stroke is unaffected. The unit uses fixed NBR bumpers for deceleration rather than adjustable air cushions, and the -S magnet supports both reed and solid-state switches.
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
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