Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 20mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke20 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20S
The AirTAC ACQJ125X20-20S is a double-acting, single-rod JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. You can fine-tune the usable extend range from 0 up to 20 mm directly on your equipment without swapping components. The retract stroke remains completely unaffected by this adjustment. As a big-bore compact variant, it supports standard strokes up to 300 mm while maintaining a space-saving riveted body design.
Because the piston area stays constant, the output force is identical to a standard ACQ of this bore, delivering 6135.9 N push and 5733.8 N pull at 0.5 MPa. The unit incorporates a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. Equipped with a built-in magnet (-S), it interfaces seamlessly with both reed and electronic solid-state sensors via its integrated mounting grooves.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 20 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 ACQJ125X20-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×20 | 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 ACQJ125X20-20S Is Used
Press Tooling Setup
Dial in the exact 0-20 mm extend position during press tooling setup to accommodate material thickness variations without machining custom spacers.
Heavy Assembly Changeover
Adapt large-frame assembly stations quickly during product changeover by turning the external M27x2.0 adjuster to meet new part dimensions.
Palletizing Stops
Modify the end stop on heavy palletizing equipment to handle different package heights, relying on the 1251 kgf max push force for robust actuation.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X20-20S the Right Cylinder?
For lower force needs, the ACQJ100 bore provides 3927.0 N push at 0.5 MPa, whereas stepping up to the ACQJ140 bore yields 7696.9 N. If your extend end position never varies, a fixed-stroke ACQ cylinder is sufficient. When ordering, verify the 125 mm bore, 20 mm full stroke, 20 mm adjuster window, the -S magnet option, and the default female M22x2.5 rod-end thread. Note that a plain ACQ-type cylinder will not hold its load on air loss; for a fail-safe hold, 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 ACQJ125X20-20S FAQ
The usable extend range is 0-20 mm (a 20 mm full stroke minus the 20 mm window). Force is identical to a standard ACQ: push is 6135.9 N and pull is 5733.8 N at 0.5 MPa, push is 8590.3 N at 0.7 MPa, and the maximum push is 1251 kgf at 1.0 MPa.
The external M27x2.0 threaded stop with lock nut limits only the extend stroke length; it does not alter the piston area or reduce the force. The cylinder uses fixed NBR elastomer bumpers at each end for deceleration. The built-in magnet (-S) works with both reed and electronic 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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