Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-75SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-75SB 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 ACQJ125X300-75SB
The AirTAC ACQJ125X300-75SB represents the big-bore JIS compact line, bringing double-acting power to applications needing up to a 300 mm stroke. It features an external M27x2.0 threaded stop with a lock nut on the rod-end side. This mechanism restricts how far the rod travels outward, providing a usable extend range of 225 to 300 mm. The inward return movement remains completely unaffected by this adjustment.
Because the internal piston area stays constant, output force equals that of a standard ACQ counterpart, yielding 6135.9 N push at 0.5 MPa. The unit incorporates a male M30x1.5 piston rod end for direct coupling, alongside a built-in piston magnet compatible with reed or solid-state sensors. Fixed NBR bumpers absorb impact energy at both stroke extremes rather than relying on adjustable pneumatic cushions.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-75SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-75SB |
|---|---|
| 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 ACQJ125X300-75SB
| 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 ACQJ125X300-75SB Is Used
Heavy Press Tonnage Setup
Dial in the exact extend position from 225 to 300 mm during heavy press commissioning to accommodate varying material thicknesses without machining new spacers.
Automated Pallet Changeover
Shift the outward stop instantly when switching pallet sizes on a large conveyor system, ensuring precise product alignment without recalibrating the entire line.
Metal Forming Trial Stops
Test intermediate extend end positions on a metal forming press to find the optimal bending depth before finalizing the mechanical setup.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-75SB the Right Cylinder?
When sizing this 125 mm bore actuator, dropping down to a 100 mm bore reduces the push force to 3927 N at 0.5 MPa, whereas stepping up to a 140 mm bore increases it to 7696.9 N. If your end-position requirement is fixed and never varies, a standard ACQ cylinder without the external adjuster will suffice. To order this adjustable version correctly, confirm the 125 mm bore, 300 mm full stroke, 75 mm window, the -S magnet option, 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 ACQJ125X300-75SB FAQ
The usable extend range is 225-300 mm (a 75 mm window off the 300 mm full stroke). It generates 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.
No, the external M27x2.0 adjuster only shortens the extend length; force remains identical to a standard ACQ because the piston area is unchanged. The cylinder uses fixed NBR bumpers for end-of-stroke deceleration, but it will not hold its load on air loss; for a fail-safe hold, use 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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