Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-100B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-100B 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 ACQJ40X125-100B
The ACQJ40X125-100B is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the EXTEND end position. You get a usable extend range of 25-125mm because the 100mm adjustment window shortens the 125mm full stroke. The RETRACT stroke remains completely unaffected. This is a long-stroke made-to-order variant, exceeding the 100mm standard maximum for this 40mm bore.
Because the piston area stays constant, force is IDENTICAL to a standard ACQ of the same bore. The adjuster changes stroke length only. It delivers 628.3N push and 527.8N pull at 0.5MPa, with a maximum push of 128kgf at 1.0MPa. Equipped with a male M14x1.5 rod-end thread (-B), it couples directly to your load. The body features fixed NBR elastomer bumpers at each end for end-of-stroke deceleration.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-100B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-100B |
|---|---|
| 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 ACQJ40X125-100B
| 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 ACQJ40X125-100B Is Used
Machining Fixture Changeover
Dial in the extend stop to hit varying material thicknesses during product changeover without machining new spacer blocks.
Packaging Line Diverter
Set the exact push distance for cartons of different widths on a packaging conveyor, tweaking the end position on the fly.
Press Trial Positions
Establish safe trial end positions on a small assembly press by limiting the extend stroke during initial tool setup.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-100B the Right Cylinder?
Comparing bores, the 32mm option yields 402.1N push @0.5MPa, while the larger 50mm bore provides 981.8N push @0.5MPa. Choose this 40mm bore if 628.3N push is sufficient. If your extend position never varies, a fixed-stroke ACQ cylinder suffices. When ordering, confirm the 40mm bore, 125mm full stroke, 100mm window, male M14x1.5 rod thread, and whether you need the -S magnet for 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 ACQJ40X125-100B FAQ
Push force is 628.3N @0.5MPa and 879.6N @0.7MPa; pull is 527.8N @0.5MPa; max push is 128kgf @1.0MPa. The usable extend range is 25-125mm (125mm full stroke minus the 100mm window).
No, the external M12x1.25 adjuster changes stroke length only; force remains identical to a standard ACQ. Fixed NBR elastomer bumpers handle deceleration at each end, as there is no adjustable air cushion.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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