Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X100-20SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X100-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 100mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke100 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X100-20SB
The AirTAC ACQJ125X100-20SB is a double-acting JIS compact cylinder featuring a big-bore 125mm design capable of standard strokes up to 300mm. An external threaded stop with a lock nut limits the extend end position, providing an 80-100mm usable extend range from the 100mm full stroke, while the retract stroke remains unaffected. It includes a male M30x1.5 piston rod end (-B) that couples directly to your load.
Because the adjuster changes stroke length only, the force is identical to a standard ACQ of this bore. The piston area is unchanged, delivering 6135.9N push and 5733.8N pull at 0.5MPa. It features fixed NBR elastomer bumpers at each end and a built-in magnet (-S) compatible with reed or electronic solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X100-20SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X100-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 100 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 ACQJ125X100-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 ACQJ125X100-20SB Is Used
Large Press Tonnage Setup
Varying dies and fixtures in heavy stamping presses require precise end-stop tuning to accommodate different material thicknesses without machining new spacers.
Heavy Material Forming
Adjusting the extend position on large metal bending equipment allows operators to dial in trial bend angles on the machine floor rapidly.
Industrial Lifting Stops
Setting intermediate lift heights in heavy-duty palletizing units ensures varying package dimensions are handled without reprogramming the motion controller.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X100-20SB the Right Cylinder?
When sizing this 125mm bore, dropping to the 100mm option yields 3927.0N push at 0.5MPa, whereas stepping up is unavailable in standard compact ranges. If your application requires a fixed 100mm extend without on-the-fly adjustments, a standard ACQ cylinder suffices. For this ACQJ configuration, confirm the 100mm full stroke, 20mm window, M30x1.5 male rod thread, and the integrated magnet for sensors.
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 ACQJ125X100-20SB FAQ
The usable extend range is 80-100mm (100mm full stroke minus the 20mm window). Force is identical to a standard ACQ of this bore: 6135.9N push and 5733.8N pull at 0.5MPa, 8590.3N push at 0.7MPa, and a maximum push of 1251 kgf at 1.0 MPa.
An external M27x2.0 threaded stop with a lock nut limits the extend stroke only; the retract stroke is unaffected. The cylinder uses fixed NBR elastomer bumpers at each end, not adjustable air cushions. For fail-safe load holding on air loss, an external rod lock or pilot-operated check valve is required, as the rod drifts when valve pressure is centered.
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Related AirTAC ACQJ Compact Cylinders
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