Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-50S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-50S 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 ACQJ125X300-50S
The ACQJ125X300-50S is a big-bore JIS compact pneumatic cylinder engineered for double-acting operation with an external extend-stop mechanism. An M27x2.0 threaded adjuster and lock nut limit the forward stroke, providing a usable extend range of 250 to 300 mm. The retract distance remains fixed at its full 300 mm length. Because the piston area is unchanged, output force equals a standard ACQ of this size.
This heavy-duty unit delivers 6135.9 N push and 5733.8 N pull at 0.5 MPa, peaking at 1251 kgf maximum push. It features a 32 mm piston rod, PT3/8 porting, and a female M22x2.5 rod-end thread. Fixed NBR elastomer bumpers absorb end-of-stroke impact, while the included -S magnet enables position sensing with reed or solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-50S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-50S |
|---|---|
| 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 ACQJ125X300-50S
| 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 ACQJ125X300-50S Is Used
Heavy Press Tonnage Setup
Dial in the exact 250 to 300 mm extend reach on a multi-ton press without machining custom spacers for different material thicknesses.
Automated Welding Changeover
Shift the end-of-stroke clamp position rapidly during automotive fixture changeovers to accommodate new chassis geometries.
Large Mold Trial Positioning
Establish precise trial end positions when seating large injection molds, relying on the external stop rather than reprogramming flow controls.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-50S the Right Cylinder?
Selecting this 125 mm bore provides massive thrust for large fixtures. If 5733.8 N pull at 0.5 MPa is insufficient, stepping up is not possible within this compact family as 125 mm is already a big-bore variant; instead, consider dual mounting. If 6135.9 N push exceeds your requirement, dropping to an 100 mm bore yields 3927.0 N push at 0.5 MPa. Choose this adjustable model over a fixed ACQ only when setups require frequent extend-position tuning. Verify your ordering code includes the 300 mm full stroke, 50 mm window, -S magnet, and female 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 ACQJ125X300-50S FAQ
It generates 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 adjuster allows you to shorten the extend stroke by up to 50 mm, yielding a usable extend range of 250 to 300 mm.
No, the adjuster only limits how far the rod extends, leaving the piston area untouched so force remains identical to a standard ACQ. The cylinder uses fixed NBR elastomer bumpers at both ends rather than adjustable air cushions, and the -S magnet works with reed or solid-state switches.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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