Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-100SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-100SB 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 ACQJ125X300-100SB
The AirTAC ACQJ125X300-100SB is a double-acting, big-bore JIS compact cylinder featuring an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend range from 200 mm up to the full 300 mm directly on the machine without changing parts, while the retract stroke remains completely unaffected. It includes a male M30x1.5 rod thread and a built-in piston magnet.
Because the adjuster changes stroke length only, the piston area stays the same, meaning the force is identical to a standard ACQ of this bore. You get 6135.9 N push and 5733.8 N pull at 0.5 MPa, scaling to 8590.3 N push at 0.7 MPa, with a maximum push capacity of 1251 kgf at 1.0 MPa. The cylinder uses a fixed elastomer NBR bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-100SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-100SB |
|---|---|
| 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 ACQJ125X300-100SB
| 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 ACQJ125X300-100SB Is Used
Heavy Press Tonnage Check
Dial in the exact 200 to 300 mm extend position on a multi-ton metal forming press during setup, allowing operators to test different material thicknesses without machining new stop collars.
Large Assembly Fixture Changeover
Adapt a bulky automotive subassembly fixture to new product variants by turning the external M27x2.0 adjuster screw, shifting the extend end stop to match new component dimensions rapidly.
Pallet Diverter Positioning
Fine-tune the extend stroke on a heavy-duty conveyor diverter arm to handle different pallet sizes, ensuring the 32 mm rod clears the load before the fixed elastomer bumper bottoms out.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-100SB the Right Cylinder?
For applications needing 6135.9 N push at 0.5 MPa, this 125 mm bore delivers substantial force within a compact envelope. If you require less force, dropping to the 100 mm bore provides 3927.0 N push, whereas stepping up to the 140 mm bore yields 7696.9 N push. If your end position never varies, a fixed-stroke ACQ cylinder is sufficient; choose this ACQJ variant when you need on-machine extend adjustability. Confirm the ordering essentials: 125 mm bore, 300 mm full stroke, 100 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 ACQJ125X300-100SB FAQ
It delivers 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. The full stroke is 300 mm, but the external stop allows you to shorten the extend stroke by up to 100 mm, giving a usable extend range of 200 to 300 mm. The retract stroke remains the full 300 mm.
No, the force is identical to a standard ACQ of the same bore because the adjuster only limits how far the rod extends, not the piston area. The cylinder uses a fixed elastomer NBR bumper at each end for deceleration rather than an adjustable air cushion. The built-in -S magnet works with both reed and electronic solid-state switches for position sensing.
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