Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-30SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-30SB 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 ACQJ125X300-30SB
The AirTAC ACQJ125X300-30SB is a double-acting, single-rod JIS compact cylinder engineered for big-bore applications requiring precise extend positioning. An external M27x2.0 threaded stop and lock nut restricts the outward stroke, yielding a usable extend span of 270 to 300 mm. The return stroke remains completely unaffected. Because the internal piston area stays constant, output force equals a standard ACQ of this exact size.
This variant includes a built-in piston magnet (-S) compatible with reed or solid-state electronic switches, plus a male M30x1.5 rod-end thread (-B) for direct load coupling. Deceleration relies on a fixed NBR elastomer bumper at each end. Operating pressure spans 0.15 to 1.0 MPa, and the PT3/8 port handles high flow rates for heavy-duty cycles.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-30SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-30SB |
|---|---|
| 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 ACQJ125X300-30SB
| 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 ACQJ125X300-30SB Is Used
Heavy Press Tooling
Dial in the exact 270 to 300 mm extend reach during automotive stamping changeovers without machining new spacer blocks.
Large Fixture Calibration
Trial-fit assembly stops on heavy machinery by turning the external M27x2.0 adjuster to find the perfect part-contact point.
Pallet Positioning
Fine-tune the end-of-stroke clamping depth for varying pallet heights in automated warehouse handling systems.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-30SB the Right Cylinder?
When sizing this 125 mm bore unit, dropping down to a 100 mm bore yields 3927.0 N push at 0.5 MPa, while stepping up to a 140 mm bore provides 7696.9 N push. Choose this adjustable model only if your setup requires frequent end-position tweaking; a fixed-stroke ACQ suffices for static stops. Confirm your ordering essentials: 125 mm bore, 300 mm full stroke, 30 mm window, S magnet, and 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 ACQJ125X300-30SB FAQ
The usable extend range is 270 to 300 mm (full 300 mm stroke minus the 30 mm window). Force is identical to a standard ACQ: 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 M27x2.0 threaded stop with lock nut limits only the outward stroke; the retract stroke is unaffected. Force remains unchanged because the piston area is the same. Fixed NBR bumpers decelerate the load at stroke ends. For fail-safe load holding on air loss, add an external rod lock, as a plain ACQ-type cylinder will drift.
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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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