Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X175-40SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X175-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 175mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke175 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X175-40SB
The AirTAC ACQJ140X175-40SB is a double-acting, big-bore JIS compact cylinder featuring an external threaded stop with a lock nut that restricts the extend end position. You can fine-tune the usable extend stroke anywhere between 135 and 175 mm directly on your machinery without swapping parts. The retract movement remains completely unaffected by this adjustment.
Because the piston area stays constant, output force is identical to a standard ACQ of this bore, yielding 7696.9 N push and 7294.8 N pull at 0.5 MPa. This variant includes a male M30x1.5 piston rod end for direct load coupling and a built-in magnet (-S) for position sensing. It relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X175-40SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X175-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 175 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 ACQJ140X175-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×175 | 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 ACQJ140X175-40SB Is Used
Press Tooling Setup
Dial in the exact 135 to 175 mm extend position during press tooling setup to accommodate varying material thicknesses without machining new spacers.
Heavy Fixture Changeover
Adapt the end stop rapidly during heavy fixture changeovers on large automotive assembly lines, utilizing the full 1570 kgf max push at 1.0 MPa.
Wood Processing Stops
Modify clamping endpoints on the fly for different wood panel sizes in high-speed processing machinery using the external M27x2.0 adjuster.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X175-40SB the Right Cylinder?
When sizing this 140 mm bore unit, dropping down to a 125 mm bore lowers the 0.5 MPa push force to 6135.9 N, while stepping up to a 160 mm bore raises it to 10053.1 N. If your machinery never requires altering the extend endpoint, a fixed-stroke ACQ cylinder is the simpler choice. To order this adjustable version correctly, confirm the 140 mm bore, 175 mm full stroke, 40 mm adjustment window, the -S magnet for sensors, and the -B male 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 ACQJ140X175-40SB FAQ
The usable extend range is 135 to 175 mm (a 40 mm window off the 175 mm full stroke). Force equals a standard ACQ: 7696.9 N push and 7294.8 N pull at 0.5 MPa, 10775.7 N push at 0.7 MPa, and a maximum push of 1570 kgf at 1.0 MPa.
An external M27x2.0 threaded stop with a lock nut limits the extend distance without altering the piston area, so force is unchanged. The cylinder uses fixed elastomer bumpers, not adjustable cushions. Note that a plain ACQ-type does not hold its load on air loss; for a fail-safe hold, use an external rod lock or pilot-operated check valve.
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Related AirTAC ACQJ Compact Cylinders
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