Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X20-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X20-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 20mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke20 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X20-20S
The AirTAC ACQJ140X20-20S is a big-bore JIS compact, double-acting single-rod cylinder engineered for adaptable machinery. An external threaded stop with a lock nut restricts how far the rod travels outward, granting a usable extend span of 0-20mm from a 20mm full stroke. Retract distance remains fixed. Because the piston area stays constant, output force equals a standard ACQ of identical size: 7696.9N push and 7294.8N pull at 0.5MPa.
This Ø140mm unit features a 32mm piston rod, PT3/8 porting, and an M27x2.0 external adjuster thread. It incorporates a fixed elastomer bumper at each end for end-of-stroke deceleration. The integrated -S magnet pairs with reed or solid-state switches for position sensing. Operating pressure spans 0.15-1.0MPa, with a maximum push capacity of 1570kgf at 1.0MPa. Note that a plain air cylinder drifts if air pressure drops; utilize an external rod lock for fail-safe load holding.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X20-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X20-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 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 (Ø140mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 7697 N | 7295 N |
| 0.7 MPa | 10776 N | — |
| Max (@1.0 MPa) | 1570 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 ACQJ140X20-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | 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 ACQJ140X20-20S Is Used
Press Tonnage Setup
Dial in the exact 0-20mm extend end position during press tooling setup without machining custom spacers or changing cylinder parts.
Heavy Fixture Changeover
Adapt large automated welding fixtures quickly when product variants require a slightly shorter forward travel distance on the line.
Clamping Depth Trials
Test varying clamping depths on bulky automotive assemblies by turning the external M27x2.0 stopper nut to find the optimal stroke.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X20-20S the Right Cylinder?
When sizing this Ø140mm bore, consider the adjacent big-bore compact options. Stepping down to a Ø125 bore yields 6135.9N push at 0.5MPa, whereas stepping up to a Ø160 bore provides 10053.1N push at 0.5MPa. If your extend end position never varies, a fixed-stroke ACQ cylinder is sufficient. For this adjustable variant, verify your ordering code includes bore, 20mm full stroke, -20mm window, the -S magnet, and the default female rod-end thread (M22x2.5).
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 ACQJ140X20-20S FAQ
This cylinder delivers 7696.9N push and 7294.8N pull at 0.5MPa, 10775.7N push at 0.7MPa, and a maximum push of 1570kgf at 1.0MPa. The full stroke is 20mm with a -20mm adjustable window, giving a usable extend range of 0-20mm. The retract stroke is unaffected by the adjuster.
An external threaded stop with a lock nut physically limits how far the rod extends outward, shortening the forward stroke only. Piston area remains unchanged, so force is identical to a standard ACQ. The cylinder uses a fixed elastomer bumper at each end for deceleration, not an adjustable air cushion. The -S magnet works with reed or electronic solid-state switches.
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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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