Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 20mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke20 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20SB
The ACQJ125X20-20SB is a double-acting, big-bore JIS compact cylinder featuring an external extend stop. A threaded rod with a lock nut lets you fine-tune the forward end position on the machine. With a 20 mm full stroke and a 20 mm adjustment window, the usable extend range runs 0-20 mm. The return stroke remains completely unaffected.
Because the piston area stays the same, output force equals a standard ACQ of this bore. You get 6135.9 N push and 5733.8 N pull at 0.5 MPa. The -S magnet enables detection via reed or solid-state switches, while the -B suffix provides a male M30x1.5 rod end. Fixed elastomer bumpers handle end-of-stroke deceleration.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 20 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 ACQJ125X20-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×20 | 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 ACQJ125X20-20SB Is Used
Heavy Press Tunning
Dial in the exact 0-20 mm extend reach on heavy stamping presses during setup, accommodating different material thicknesses without swapping hardware.
Large Fixture Changeover
Adapt end-stop positions rapidly on large machining fixtures when switching between product variants, saving changeover time on the factory floor.
Clamping Depth Trials
Test clamping reach on new automotive assemblies by adjusting the forward stroke limit via the M27x2.0 external stopper until the optimal grip is found.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20SB the Right Cylinder?
For 0.5 MPa tasks needing less than 6135.9 N push, step down to the 100 mm bore (3927.0 N). If your application requires more power, the 140 mm bore yields 7696.9 N. Choose this 125 mm big-bore compact unit when space is tight but forces near 613 kgf are mandatory. If the end position never varies, a fixed-stroke ACQ suffices. Verify your ordering code covers bore, 20 mm full stroke, 20 mm window, the -S magnet, and -B male M30x1.5 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 ACQJ125X20-20SB FAQ
It delivers 6135.9 N push and 5733.8 N pull at 0.5 MPa, 8590.3 N push at 0.7 MPa, and a maximum push of 1251 kgf at 1.0 MPa. The full stroke is 20 mm with a 20 mm adjustment window, allowing a usable extend range of 0-20 mm.
The M27x2.0 threaded adjuster only limits the extend length, keeping force identical to a standard ACQ. NBR elastomer bumpers decelerate the motion at the ends. The -S piston magnet works with reed or electronic switches, and the -B option provides a male M30x1.5 rod end.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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