Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke50 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30S
The AirTAC ACQJ125X50-30S is a big-bore JIS compact double-acting cylinder engineered for adaptable extend positioning. An external M27x2.0 threaded stop and lock nut restricts the forward stroke, yielding a usable extend span of 20 to 50 mm from the 50 mm base length. The retract distance remains completely unaffected by this mechanism.
Because the adjustment solely limits forward travel, piston area stays constant, meaning force output perfectly mirrors a standard ACQ unit. At 0.5 MPa this Ø125 mm bore generates 6135.9 N of push and 5733.8 N of pull, scaling to 8590.3 N push at 0.7 MPa. It features a Ø32 mm rod, PT3/8 porting, fixed NBR elastomer bumpers, and a built-in magnet (-S) compatible with reed or solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 50 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 ACQJ125X50-30S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 ACQJ125X50-30S Is Used
Heavy Press Tonnage Setup
Dial in the exact 20 to 50 mm extend contact point on a large metal-forming press during tooling trials without machining new spacer blocks.
Automotive Welding Fixtures
Accommodate varying chassis frame heights on an assembly line by tweaking the external M27x2.0 stop to shift the clamping reach instantly.
Pallet Changeover Stops
Modify the physical end-of-stroke barrier for different pallet widths in a robotic handling cell while maintaining the full retract motion.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30S the Right Cylinder?
Selecting this 125 mm bore provides massive thrust up to a 1251 kgf maximum at 1.0 MPa. If your application requires less force, stepping down to a 100 mm bore drops the 0.5 MPa push to 3927.0 N, whereas moving up to a 140 mm bore raises it to 7696.9 N. A fixed-stroke ACQ is adequate if your end position never varies, but this ACQJ variant is essential for setups requiring on-the-fly length tuning. Confirm the 50 mm base length, 30 mm window, -S magnet, and female M22x2.5 rod-end thread when ordering.
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 ACQJ125X50-30S FAQ
The usable extend range is 20 to 50 mm (50 mm full 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.
An external M27x2.0 threaded screw with a lock nut mechanically limits the forward extension, leaving retract unchanged and preserving full piston force. The cylinder uses fixed NBR elastomer bumpers rather than adjustable air cushions. Note that a plain compact cylinder does not hold loads on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
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Related AirTAC ACQJ Compact Cylinders
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