Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke125 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40SB
The AirTAC ACQJ125X125-40SB is a double-acting JIS compact cylinder featuring an external threaded stop and lock nut that limits the extend end position. With a 125mm bore and a 40mm adjustment window, you can fine-tune the usable extend range from 85mm up to 125mm directly on the machine without swapping parts. The retract stroke remains completely unaffected by this mechanism.
Because the adjuster only restricts travel length and not piston area, output force stays identical to a standard ACQ of this size, yielding 6135.9N push at 0.5MPa. This big-bore variant includes a male M30x1.5 rod end for direct load coupling, a PT3/8 port, and fixed NBR elastomer bumpers at both ends. The built-in magnet (-S) works with reed or electronic solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 125 mm |
| Adjuster thread | M27×2.0 |
| Port size | PT3/8 |
| 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 | M22×2.5 (F) / M30×1.5 (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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40SB Is Used
Heavy Press Tonnage Setup
Dial in the exact 85-125mm extend position during heavy press commissioning to accommodate varying material thicknesses without machining new spacers.
Automated Welding Changeover
Adjust the end stop rapidly during automotive fixture changeovers to locate large weldments precisely before clamping.
Large Mold Trial Positioning
Test end positions on injection molding machinery safely by limiting the extend stroke to 85mm during initial setup, then extending to full 125mm travel.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40SB the Right Cylinder?
Selecting this 125mm bore provides a massive 6135.9N push and 5733.8N pull at 0.5MPa. If your application needs less force, stepping down to a 100mm bore drops the push to 3927N, whereas moving up to a 140mm bore raises it to 7696.9N. A fixed-stroke ACQ is sufficient if your extend position never requires on-machine tuning. Confirm your ordering essentials: 125mm bore, 125mm full stroke, 40mm window, the -S magnet, and the -B male M30x1.5 rod thread.
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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-40SB FAQ
It delivers 6135.9N push and 5733.8N pull at 0.5MPa, 8590.3N push at 0.7MPa, and a maximum push of 1251kgf at 1.0MPa. The usable extend range is 85-125mm, created by shortening the 125mm full stroke by up to the 40mm window.
The external M27x2.0 threaded stop with lock nut limits extend travel without changing piston area, so force remains identical to a standard ACQ. Fixed NBR bumpers decelerate the rod near stroke ends, but a plain cylinder does not hold its load on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
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1-Year Warranty
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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