Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-100S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-100S 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 ACQJ125X300-100S
The ACQJ125X300-100S is a double-acting JIS compact cylinder from AirTAC's big-bore range, featuring a 125mm bore and a 300mm full stroke. An external threaded stop with a lock nut restricts how far the rod extends, yielding a usable forward travel window of 200-300mm. The return stroke remains completely unaffected by this adjustment. Because the internal piston area stays the same, output force equals that of a standard ACQ variant of this size.
This unit pushes with 6135.9N and pulls with 5733.8N at 0.5MPa, reaching a maximum push of 1251kgf at 1.0MPa. It incorporates a fixed NBR elastomer bumper at each end for deceleration rather than an adjustable air cushion. The -S suffix denotes a built-in piston magnet compatible with reed or electronic solid-state switches via the body grooves. Fluid supply runs through PT3/8 ports, while the rod end features an M22x2.5 female thread and the external adjuster utilizes an M27x2.0 thread.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-100S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-100S |
|---|---|
| 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 ACQJ125X300-100S
| 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 ACQJ125X300-100S Is Used
Heavy Press Tonnage Setup
Dialing in the exact bottoming position on a large metal-forming press becomes effortless, allowing operators to tweak the 200-300mm extend distance during initial tooling setup without machining custom spacers.
Automotive Welding Line Changeover
When switching body styles on a multi-model assembly fixture, the external stop rapidly adapts the clamp extension to accommodate different frame widths, minimizing line downtime.
Palletizer End-Effector Tuning
Testing final push-off distances for various pallet sizes on a robotic palletizing unit is simplified by adjusting the lock nut on the rod-end side until the optimal kinematic position is found.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-100S the Right Cylinder?
Choosing this 125mm bore provides massive thrust when 0.5MPa yields 6135.9N of push force. If your application requires slightly less power, stepping down to a 100mm bore drops the push output to 3927.0N at the same pressure. Should you need greater force, moving up to a 160mm bore increases the 0.5MPa push to 10053.1N. A standard fixed-stroke ACQ is sufficient if your end position never varies. When ordering, verify the 300mm full stroke, the 100mm adjuster window, the -S magnet option, and the female M22x2.5 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 ACQJ125X300-100S FAQ
At 0.5MPa, the push force is 6135.9N and the pull force is 5733.8N. At 0.7MPa, the push force is 8590.3N. The maximum push force is 1251kgf at 1.0MPa. The full stroke is 300mm, and with the 100mm adjustment window, the usable extend range is 200-300mm. The retract stroke remains fixed at the full 300mm.
No, turning the external M27x2.0 threaded stop only changes the extend distance; the piston area is unchanged, so force remains identical to a standard ACQ of the same bore. Deceleration is handled by fixed NBR elastomer bumpers at stroke ends, not adjustable air cushions. For high-speed or high-energy loads, adding an external shock absorber is recommended. Note that this plain compact cylinder will drift if air pressure is lost, so an external rod lock is needed for fail-safe holding.
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