Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-75S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-75S 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 ACQJ125X300-75S
The AirTAC ACQJ125X300-75S is a big-bore JIS compact pneumatic cylinder with an external extend stop. A threaded rod-end screw and lock nut let you trim the forward stroke within a 225 to 300 mm usable range, while the return stroke remains unaffected. This permits on-machine end-position tuning without swapping parts.
Because the piston area is unchanged, output force equals a standard ACQ of this bore: 6135.9 N push and 5733.8 N pull at 0.5 MPa. The body uses fixed elastomer bumpers for end-of-travel deceleration rather than adjustable air cushions. This -S variant includes a piston magnet compatible with reed or solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-75S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-75S |
|---|---|
| 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 ACQJ125X300-75S
| 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 ACQJ125X300-75S Is Used
Press Tonnage Setup
Dial in the exact 225 to 300 mm extend position during stamping press changeovers to accommodate different blank thicknesses without machining new spacers.
Large Fixture Clamping
Adapt heavy-duty clamping arms on machining centers for varying castings by fine-tuning the forward stop on the spot, ensuring precise grips.
Palletizer End Stops
Modify the extend reach on packaging lines to handle different pallet dimensions, using the external stop to set precise placement depth.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-75S the Right Cylinder?
For 0.5 MPa push needs, the smaller 100 mm bore yields 3927.0 N, whereas this 125 mm unit provides 6135.9 N. Stepping up to the 140 mm bore offers 7696.9 N. If your machine never requires stroke adjustments, a fixed-stroke ACQ125x300 cylinder suffices. When ordering, verify the 125 mm bore, 300 mm full stroke, 75 mm window, the -S magnet, and the M22x2.5 female rod-end 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 ACQJ125X300-75S 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 300 mm with a 75 mm adjustable window, giving a usable extend range of 225 to 300 mm.
The M27x2.0 external threaded stop with lock nut limits only the extend length, meaning force remains identical to a standard ACQ. Deceleration relies on fixed NBR elastomer bumpers, not adjustable air cushions, and the return stroke is unaffected.
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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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