Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-50SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-50SB 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 ACQJ125X300-50SB
The ACQJ125X300-50SB is a big-bore JIS compact, double-acting single-rod cylinder engineered for heavy-duty automation. An external threaded stop with a lock nut limits the EXTEND end position, giving a usable extend range of 250 to 300 mm. The full stroke is 300 mm, and the 50 mm adjustment window allows on-the-machine fine-tuning without changing parts. The RETRACT stroke remains completely unaffected.
Because the piston area is unchanged, the force output is identical to a standard ACQ of this bore, delivering 6135.9 N push and 5733.8 N pull at 0.5 MPa. The -S magnet enables position detection with reed or electronic solid-state switches, while the -B male rod-end thread (M30x1.5) couples directly to your load. It features a fixed NBR elastomer bumper at each end and a PT3/8 port.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-50SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-50SB |
|---|---|
| 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 ACQJ125X300-50SB
| 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 ACQJ125X300-50SB Is Used
Press Tonnage Setup
Dial in the exact 250 to 300 mm extend stop during press tooling setup, accommodating varying material thicknesses without machining new spacers.
Automotive Assembly Line
Adjust the end position on a heavy-duty stamping station to switch between different vehicle chassis frames rapidly during model changeovers.
Woodworking Clamp Fixtures
Tune the clamping reach on the fly for custom cabinet door dimensions, relying on the 1251 kgf max push to hold large panels securely.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-50SB the Right Cylinder?
Choosing this Ø125 mm cylinder yields 6135.9 N push force at 0.5 MPa. Stepping down to a Ø100 bore provides 3927.0 N push, whereas stepping up is not available as 125 mm is the entry to the big-bore compact range. If your machine never requires altering the extend endpoint, a fixed-stroke ACQ cylinder suffices. Confirm ordering essentials: 125 mm bore, 300 mm full stroke, 50 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 ACQJ125X300-50SB FAQ
At 0.5 MPa, push force is 6135.9 N and pull is 5733.8 N; at 0.7 MPa push is 8590.3 N, with a maximum push of 1251 kgf at 1.0 MPa. The usable extend range is 250 to 300 mm (a 50 mm window). The piston rod is Ø32 mm, the male rod-end thread is M30x1.5, the female thread is M22x2.5, the port is PT3/8, and the external adjuster thread is M27x2.0.
No, the external stop limits extend stroke length only; it does not alter piston area, so force remains identical to a standard ACQ. The cylinder uses a fixed NBR elastomer bumper for end-of-stroke deceleration. It will not hold a load on air loss or a centered valve; for fail-safe holding, install an external rod lock or pilot-operated check valve.
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