Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X125-100S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X125-100S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke125 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X125-100S
The AirTAC ACQJ140X125-100S is a big-bore JIS compact, double-acting single-rod cylinder engineered for heavy-duty motion control. It features an external M27x2.0 threaded stop with a lock nut on the extend side, allowing you to fine-tune the extend end position directly on your equipment. With a 125mm full stroke and a 100mm adjustment window, the usable extend range spans 25-125mm. The retract stroke remains completely unaffected by this mechanism.
Because the adjuster solely limits travel length without altering the 140mm piston area, the output force remains identical to a standard ACQ of this size. At 0.5MPa, it delivers 7696.9N of push force and 7294.8N of pull force. The cylinder relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. Equipped with a piston magnet (-S), it supports both reed and solid-state electronic sensors via its integrated mounting grooves.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X125-100S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X125-100S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 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 (Ø140mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 7697 N | 7295 N |
| 0.7 MPa | 10776 N | — |
| Max (@1.0 MPa) | 1570 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 ACQJ140X125-100S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | 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 ACQJ140X125-100S Is Used
Press Tonnage Setup
Dial in the exact extend position during stamping press changeovers to accommodate different material thicknesses without machining custom spacers.
Heavy Fixture Positioning
Adjust the end stop on large machining fixtures to locate clamping points precisely across multiple part families on the same assembly line.
Bending Machine Trials
Find the optimal metal forming angle on heavy-duty bending equipment by tweaking the extend travel window between 25 and 125mm during prototype runs.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X125-100S the Right Cylinder?
When sizing this model, consider the adjacent bores in the big-bore compact range. Stepping down to a 125mm bore yields a 0.5MPa push force of 6135.9N, while stepping up to a 160mm bore provides 10053.1N. If your application never requires altering the extend end position, a fixed-stroke ACQ cylinder is sufficient and simplifies the setup. To order this adjustable unit correctly, confirm the 140mm bore, 125mm full stroke, 100mm window, the -S magnet option, and the default female M22x2.5 rod-end thread. Note that a plain ACQ-type cylinder will not hold its load on air loss; for fail-safe holding, specify an external rod lock or pilot-operated check valve.
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 ACQJ140X125-100S FAQ
At 0.5MPa, the push force is 7696.9N and the pull force is 7294.8N. At 0.7MPa, the push force is 10775.7N, and the maximum push force is 1570kgf at 1.0MPa. The full stroke is 125mm with a 100mm adjustment window, yielding a usable extend range of 25-125mm.
The external M27x2.0 threaded stop changes only the extend stroke length, meaning the force is identical to a standard ACQ of the same bore. End-of-stroke deceleration is handled by a fixed NBR elastomer bumper, not an adjustable air cushion. For high kinetic energy loads, you should add an external shock absorber or slow the approach speed.
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