Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 30mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke30 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20SB
The AirTAC ACQJ125X30-20SB is a big-bore JIS compact pneumatic cylinder engineered for double-acting operation with an external extend stop. A threaded mechanical adjuster paired with a lock nut restricts forward travel, yielding a usable extend span of 10 to 30 mm. The return stroke remains fixed at the original 30 mm. Because the piston area stays constant, output power matches a standard ACQ exactly.
This heavy-duty variant delivers 6135.9 N of push force at 0.5 MPa and incorporates a male M30x1.5 rod-end thread for direct mounting. The body houses NBR elastomer bumpers at both limits rather than adjustable air cushions, handling kinetic energy at the end of motion. Equipped with the -S magnet option, the unit readily interfaces with reed or solid-state switches via its integrated mounting grooves.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 30 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 ACQJ125X30-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×30 | 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 ACQJ125X30-20SB Is Used
Press Tooling Changeover
Adapt forming dies rapidly on a 125 mm press fixture by dialing the external stop to shift the end position between different material thicknesses.
Heavy Fixture Positioning
Secure large automotive castings by fine-tuning the clamping reach in 10 to 30 mm increments without machining new spacer blocks.
Pallet Lift Stops
Control the exact raise height of a heavy goods pallet elevator, allowing operators to match varying conveyor heights safely on the fly.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X30-20SB the Right Cylinder?
Selecting this 125 mm bore unit is appropriate when your setup demands substantial thrust but requires precise forward-position tweaking on the machine itself. If your equipment only needs a fixed 30 mm forward movement, a standard ACQ125X30 cylinder is sufficient. When comparing sizes, stepping down to a 100 mm bore drops the 0.5 MPa push force to 3927.0 N, whereas this 125 mm model provides 6135.9 N. Ensure your order specifies the 30 mm full stroke, the 20 mm window, the -S magnet, 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 ACQJ125X30-20SB FAQ
At 0.5 MPa, this cylinder generates 6135.9 N of push force and 5733.8 N of pull force. At 0.7 MPa, the push force reaches 8590.3 N, with a maximum push capacity of 1251 kgf at 1.0 MPa. The full stroke is 30 mm, and with the 20 mm adjustment window, the usable extend range is 10 to 30 mm.
The external M27x2.0 threaded stop with a lock nut mechanically limits the forward travel distance without altering the piston area, meaning output power remains identical to a standard ACQ. The retract stroke is unaffected. The cylinder uses fixed NBR bumpers for end-of-stroke deceleration, but it will not hold a load on air loss; for fail-safe holding, install an external rod lock or pilot-operated check valve.
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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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