Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke300 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50SB
The AirTAC ACQJ140X300-50SB is a double-acting JIS compact cylinder featuring an external extend-stop mechanism. An external M27x2.0 threaded screw with a lock nut restricts how far the rod travels outward, providing a usable extension range of 250-300mm from the 300mm full stroke. The return stroke remains completely unaffected. This unit includes a male M30x1.5 rod end and a built-in piston magnet for position sensing.
Because the adjustment only limits travel length and leaves piston area untouched, output force stays identical to a standard ACQ of this bore. You get 7696.9N push and 7294.8N pull at 0.5MPa, scaling to 1570kgf maximum push at 1.0MPa. The big-bore 140mm body uses a PT3/8 port and fixed NBR elastomer bumpers at both ends to absorb end-of-stroke impacts.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 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 (Ø140mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 7697 N | 7295 N |
| 0.7 MPa | 10776 N | — |
| Max (@1.0 MPa) | 1570 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 ACQJ140X300-50SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | 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 ACQJ140X300-50SB Is Used
Press Tonnage Calibration
Dial in the exact 250-300mm extend position during press setup to test different material thicknesses without machining new spacer blocks.
Automotive Welding Line Changeover
Quickly reposition the extend end-stop when switching between vehicle models on a heavy-duty assembly fixture, saving tooling swap time.
Heavy Pallet Positioning
Fine-tune the push-out depth for varying pallet sizes on a 140mm bore actuator, relying on the 7696.9N force to shift heavy loads.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-50SB the Right Cylinder?
When sizing this 140mm bore unit, dropping down to a 125mm cylinder lowers push force to 6135.9N at 0.5MPa, while stepping up to a 160mm bore increases it to 10053.1N. If your machine never requires end-position variance, a fixed-stroke ACQ of the same bore is simpler and shorter. For this adjustable model, verify your ordering code includes the 300mm full stroke, the 50mm 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 ACQJ140X300-50SB FAQ
It delivers 7696.9N push and 7294.8N pull at 0.5MPa, 10775.7N push at 0.7MPa, and 1570kgf max push at 1.0MPa. The 300mm full stroke has a 50mm window, allowing an extend range of 250-300mm. The rod is 32mm with a male M30x1.5 end, the adjuster thread is M27x2.0, and the port is PT3/8.
The external adjuster screw limits only the extend stroke length, meaning force remains identical to a standard ACQ since piston area is unchanged. Fixed elastomer bumpers decelerate the rod near stroke ends. Note that a plain compact cylinder does not hold loads on air loss; for fail-safe holding, install an external rod lock or pilot-operated check valve.
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Related AirTAC ACQJ Compact Cylinders
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