Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-40S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-40S 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 ACQJ125X300-40S
The AirTAC ACQJ125X300-40S is a large-bore JIS compact cylinder featuring an external threaded stop mechanism. By turning the M27x2.0 adjuster screw with its lock nut, you can shorten the extend stroke by up to 40 mm. This yields a usable forward travel range of 260 to 300 mm, while the retract movement remains at the full 300 mm. The unit includes a built-in magnet (-S) for position sensing.
Because the piston area is unaltered, output thrust equals a standard ACQ of identical size: 6135.9 N push at 0.5 MPa. The body integrates fixed NBR elastomer bumpers at both ends to absorb impact energy. Operating pressure spans 0.15 to 1.0 MPa, and the PT3/8 porting handles high flow requirements.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-40S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-40S |
|---|---|
| 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 ACQJ125X300-40S
| 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 ACQJ125X300-40S Is Used
Heavy Press Tonnage Setup
Dial in the exact 260 to 300 mm forward position during heavy press commissioning to test material deformation limits before locking the rod nut.
Automotive Product Changeover
Quickly alter the extend endpoint by up to 40 mm on an automotive stamping line when switching between different chassis variants.
Large Welding Fixture Trials
Find the optimal clamping reach on oversized welding fixtures without machining custom spacers or disassembling the pneumatic cylinder.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X300-40S the Right Cylinder?
If 8590.3 N of thrust at 0.7 MPa is insufficient, consider moving up to the 160 mm bore, which provides 14074.3 N at that same pressure. Conversely, dropping to the 140 mm bore yields 7696.9 N at 0.5 MPa, saving space if 6135.9 N is overkill. Choose this specific adjustable model only if your fixture requires on-the-fly end-position changes; otherwise, a fixed-stroke ACQ125X300S is simpler. Confirm your ordering parameters: 125 mm bore, 300 mm full stroke, 40 mm adjuster window, female M22x2.5 rod end, and the -S magnet option.
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 ACQJ125X300-40S FAQ
The bore is 125 mm with a 300 mm full stroke and a 40 mm adjustment window, giving a usable extend range of 260 to 300 mm. 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.
No, the adjuster only limits how far the rod extends, leaving the piston area untouched so force remains identical to a standard ACQ. The retract stroke is also unaffected. End-of-travel energy is handled by fixed NBR elastomer bumpers, and the built-in -S magnet works with both reed and solid-state switches.
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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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