Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10B 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 ACQJ40X125-10B
The ACQJ40X125-10B is a double-acting, JIS compact cylinder featuring a 40mm bore and a 125mm full stroke. As a long-stroke made-to-order variant, it exceeds the standard 100mm maximum for this bore size. It incorporates an external threaded stop with a lock nut on the rod side, allowing you to fine-tune the extend end position without swapping parts. The usable extend range spans 115-125mm, while the retract stroke remains completely unaffected.
Because the piston area is unchanged, the output force matches a standard ACQ exactly, yielding 628.3N push and 527.8N pull at 0.5MPa. The unit includes a male M14x1.5 piston rod end for direct load coupling and uses a PT1/8 port. It relies on a fixed NBR elastomer bumper at each end for deceleration rather than an adjustable air cushion. Note that a plain compact cylinder will drift and lose its load position on air loss; for fail-safe holding, utilize an external rod lock or pilot-operated check valve.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10B |
|---|---|
| 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 ACQJ40X125-10B
| 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 ACQJ40X125-10B Is Used
Machining Fixture Stops
Dial in the exact extend position of clamping arms on CNC machining centers during setup changes without fabricating new spacer rings.
Carton Sealing Heads
Accommodate varying box heights on packaging lines by trimming the extend stroke up to 10mm to perfectly position sealing flap mechanisms.
Assembly Press Stroke
Establish trial end positions for pressing bearings on automated assembly equipment, ensuring parts bottom out correctly before final lockdown.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X125-10B the Right Cylinder?
If you need slightly less thrust, the 32mm bore yields 402.1N push at 0.5MPa, whereas stepping up to the 50mm bore provides 981.8N. If your machinery never requires stroke adjustments, a fixed-stroke ACQ cylinder is sufficient. When ordering this unit, verify the 40mm bore, 125mm full stroke, 10mm adjustment window, the male M14x1.5 rod thread, and note that this specific SKU ships without a magnet.
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 ACQJ40X125-10B FAQ
This cylinder delivers 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa. The full stroke is 125mm with a 10mm adjustment window, giving a usable extend range of 115-125mm.
The adjuster uses an M12x1.25 external threaded stop with a lock nut to physically limit how far the rod extends, shortening the stroke without changing piston area, so force remains identical to a standard ACQ. The retract stroke is unaffected, and the fixed elastomer bumper handles end-of-stroke deceleration.
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Covers non-human-caused product damage.
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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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