Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke300 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-20S
The AirTAC ACQJ125X300-20S is a double-acting JIS compact cylinder featuring an external extend-stop mechanism. An M27x2.0 threaded adjuster with a lock nut lets you set the forward end position on the machine, yielding a usable extend range of 280-300mm. The return stroke remains fixed at the full 300mm.
Because the piston area is unchanged, output force matches a standard ACQ of this bore exactly: 6135.9N push and 5733.8N pull at 0.5MPa. This big-bore variant uses a 32mm rod, PT3/8 porting, and NBR elastomer bumpers at both ends for fixed deceleration. The -S magnet enables tracking via reed or solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 300 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 ACQJ125X300-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×300 | 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 ACQJ125X300-20S Is Used
Press Tooling Setup
Dial in the exact clamping depth on heavy stamping presses during initial tool installation without machining custom spacers.
Multi-Product Forming
Switch between material blanks of varying thicknesses on a single forming line by rotating the stopper nut to the required position.
Heavy Lift Dwell
Set precise upper travel limits for large lifting platforms in automated assembly cells to prevent mechanical over-travel.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-20S the Right Cylinder?
Choose this 125mm bore for heavy tasks needing up to 1251kgf max push. If your application never requires altering the forward endpoint, a fixed-stroke ACQ125X300 is simpler and sufficient. When ordering, verify the 300mm full stroke, 20mm adjust window, -S magnet, and female M22x2.5 rod thread. For higher kinetic energy at rapid cycle rates, plan to add an external shock absorber since the bumpers are non-adjustable.
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 ACQJ125X300-20S FAQ
It provides 6135.9N push and 5733.8N pull at 0.5MPa, 8590.3N push at 0.7MPa, and a maximum push of 1251kgf at 1.0MPa. The usable extend range is 280-300mm (a 20mm window), while the retract stroke stays at the full 300mm.
No. The M27x2.0 stopper only shortens the extend stroke length, leaving the piston area and force identical to a standard ACQ. The cylinder uses fixed NBR bumpers for end deceleration, not a brake. A plain ACQ-type will drift on air loss, so you need an external rod lock or pilot-operated check valve for fail-safe load holding.
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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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