Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke50 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-20S
The ACQJ140X50-20S is a big-bore JIS compact pneumatic cylinder featuring a 140mm bore and a 50mm full stroke. An external threaded stop with a lock nut limits the EXTEND end position, providing a 20mm adjustment window. This allows you to fine-tune the usable extend range from 30mm up to 50mm directly on the machine without changing parts. The RETRACT stroke remains completely unaffected by this mechanism.
Because the adjuster only restricts travel length and not the piston area, the output force is identical to a standard ACQ of this size. At 0.5 MPa it delivers 7696.9 N of push force and 7294.8 N of pull force. The unit relies on a fixed NBR elastomer BUMPER at each end for deceleration rather than an adjustable air cushion. Equipped with a piston magnet (-S), it supports both reed and solid-state electronic switches via its integrated sensor grooves.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 50 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 ACQJ140X50-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×50 | 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 ACQJ140X50-20S Is Used
Press Tonnage Setup
Dial in the exact extend end position during press tonnage calibration, allowing operators to test multiple trial end positions on heavy machinery without machining new spacers.
Automated Line Changeover
Adapt clamping locations rapidly when switching product families on a high-force assembly line, using the external M27x2.0 adjuster to shorten the extend stroke by up to 20mm.
Metal Forming Stops
Regulate the deformation depth on heavy-gauge metal bending fixtures, tweaking the end stop on the fly to compensate for material spring-back without altering the unaffected retract stroke.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-20S the Right Cylinder?
For sizing context, dropping to a 125mm bore reduces the 0.5 MPa push force to 6135.9 N, whereas this 140mm unit provides 7696.9 N. Moving up to a 160mm bore yields 10053.1 N of push. If your application never requires stroke length changes, a fixed-stroke ACQ cylinder is sufficient. When ordering this adjustable variant, confirm the 140mm bore, 50mm full stroke, 20mm window, the -S magnet option, and the default female M22x2.5 rod end thread. The standard port size is PT3/8.
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 ACQJ140X50-20S FAQ
This cylinder provides a usable extend range of 30-50mm (a 50mm full stroke shortened by a 20mm window). It generates 7696.9 N of push and 7294.8 N of pull at 0.5 MPa, 10775.7 N of push at 0.7 MPa, and a maximum push of 1570 kgf at 1.0 MPa.
No, the adjuster changes the stroke length only, meaning force remains identical to a standard ACQ. Deceleration is handled by a fixed NBR elastomer bumper at each end, not an adjustable air cushion. Note that this cylinder does not hold its load on air loss; use an external rod lock for fail-safe holding.
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Related AirTAC ACQJ Compact Cylinders
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