Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-40S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-40S 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 ACQJ125X75-40S
The AirTAC ACQJ125X75-40S is a double-acting JIS compact cylinder featuring a big 125mm bore and an external extend stop. A threaded adjuster with a lock nut lets you fine-tune the extend end position on the machine, yielding a usable extend range of 35-75mm from the 75mm full stroke. The retract distance remains completely unaffected. Because the piston area stays constant, output force is identical to a standard ACQ of this size.
This unit delivers 6135.9N push and 5733.8N pull force at 0.5MPa, requiring filtered 40um air. It incorporates a fixed NBR elastomer bumper at each end for deceleration rather than an adjustable air cushion. The built-in piston magnet (-S) supports both reed and solid-state electronic switches via the body grooves. The rod measures 32mm with a standard female M22x2.5 end thread, while the external adjuster uses an M27x2.0 thread.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-40S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-40S |
|---|---|
| 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 ACQJ125X75-40S
| 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 ACQJ125X75-40S Is Used
Heavy Press Tonnage Checks
Dial in the exact 35-75mm extend reach during product-changeover on a large stamping press without swapping out the entire cylinder body.
Large Weldment Fixturing
Adjust the end stop on the fly to clamp varying heavy steel weldment profiles securely before robotic welding.
Pallet Lift Dwell Tuning
Fine-tune the lift height and dwell position for oversized pallets in packaging lines, relying on the fixed NBR bumper for end-of-stroke deceleration.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-40S the Right Cylinder?
When sizing this big-bore unit, consider the adjacent standard bores: the 100mm bore yields 3927N push at 0.5MPa, while the 160mm bore provides 10053.1N push at 0.5MPa. Choose this specific model if your fixture requires exact 35-75mm extend positioning without machining custom spacers. If your end position never varies, a fixed-stroke ACQ cylinder will suffice and avoids the extra adjuster overhang. For ordering, confirm the 125mm bore, 75mm full stroke, 40mm adjustment window, the -S magnet option, and the default female M22x2.5 rod thread. Remember that a plain compact cylinder drifts on air loss; for fail-safe holding, specify an external rod lock or pilot-operated check valve.
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 ACQJ125X75-40S FAQ
This 125mm bore cylinder provides 6135.9N push and 5733.8N pull force at 0.5MPa, 8590.3N push at 0.7MPa, and a maximum push of 1251kgf at 1.0MPa. The full stroke is 75mm, but the external M27x2.0 stop allows you to shorten the extend stroke by up to 40mm, yielding a usable extend range of 35-75mm.
No, the output force remains identical to a standard ACQ of the same bore because the adjuster only limits how far the rod extends, not the piston area. The retract stroke is also unaffected. The cylinder relies on a fixed elastomer bumper for deceleration, and the -S magnet works with both reed and solid-state electronic switches.
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Related AirTAC ACQJ Compact Cylinders
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