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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
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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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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