Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-75S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-75S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke75 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-75S
The AirTAC ACQJ125X75-75S is a double-acting, single-rod JIS compact cylinder featuring a big 125 mm bore and a 75 mm full stroke. An external threaded stop with a lock nut limits the extend end position, allowing you to fine-tune the usable extend range from 0 mm up to 75 mm directly on the machine. The retract stroke remains completely unaffected by this adjustment. Because the piston area is unchanged, the force output is identical to a standard ACQ of this bore, yielding 6135.9 N push and 5733.8 N pull at 0.5 MPa.
This big-bore compact variant supports standard strokes up to 300 mm and integrates fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration. The included -S piston magnet works seamlessly with both reed and electronic solid-state switches via the built-in grooves. Operating pressure spans 0.15-1.0 MPa, and the piston rod measures Ø32 mm with a default female M22x2.5 thread, while the external adjuster uses an M27x2.0 thread.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-75S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-75S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 75 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 ACQJ125X75-75S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 ACQJ125X75-75S Is Used
Heavy Press Tonnage Setup
Dial in the exact 0-75 mm extend position during heavy press machine commissioning to accommodate varying material thicknesses without swapping cylinders.
Automated Pallet Changeover
Adapt end-stops rapidly on large pallet handling systems when switching to different pallet footprints, utilizing the full 6135.9 N push force at 0.5 MPa.
Large Fixture Trial Positions
Test multiple clamping end-points on large welding fixtures by adjusting the external M27x2.0 stop screw on-site, avoiding the need for custom spacer rings.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-75S the Right Cylinder?
For 0.5 MPa push requirements around 6135.9 N, this 125 mm bore is a strong match, offering a maximum push capacity of 1251 kgf at 1.0 MPa. If your application needs less force, stepping down to a 100 mm bore provides 3927.0 N push at 0.5 MPa, whereas moving up to a 140 mm bore yields 7696.9 N. A fixed-stroke ACQ is sufficient if your extend end position never varies. When ordering, confirm the 125 mm bore, 75 mm full stroke, 75 mm adjustable window, the -S magnet, 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 ACQJ125X75-75S FAQ
At 0.5 MPa, the push force is 6135.9 N and the pull force is 5733.8 N. At 0.7 MPa, the push force is 8590.3 N, with a maximum push of 1251 kgf at 1.0 MPa. The full stroke is 75 mm, and the adjustable window is 75 mm, meaning the usable extend range can be fine-tuned from 0 to 75 mm.
No, the external M27x2.0 threaded stop only changes the extend stroke length, not the piston area, so force remains identical to a standard ACQ. The cylinder uses fixed NBR elastomer bumpers at both ends for deceleration rather than adjustable air cushions. Additionally, the -S magnet supports both reed and electronic solid-state switches.
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