Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke250 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-20S
The ACQJ140X250-20S is a double-acting, single-rod JIS compact cylinder built for big-bore applications, featuring a 250mm full stroke and an external extend stop. A threaded adjuster with a lock nut lets you set the extend end position anywhere within a 230 to 250mm range without swapping parts. The retract stroke remains completely unaffected by this adjustment.
Because the piston area stays the same, output force is identical to a standard ACQ of this size, delivering 7696.9N push and 7294.8N pull at 0.5MPa. This big-bore unit uses a PT3/8 port, a 32mm rod, and fixed NBR elastomer bumpers at both ends for end-of-travel deceleration. The -S option includes a built-in piston magnet compatible with reed or electronic solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 250 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 ACQJ140X250-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×250 | 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 ACQJ140X250-20S Is Used
Press Tonnage Setup
Dial in the exact extend end position during a press tooling setup, allowing 20mm of on-the-fly adjustment to accommodate varying material thicknesses without machining new spacers.
Heavy Fixture Changeover
Adapt large automated welding fixtures for different product variants by turning the external stopper nut, shifting the extend endpoint within the 230-250mm window rapidly on the factory floor.
Large Press Trial Positions
Establish trial end positions on heavy forming machinery, using the adjustable stop to safely probe the correct stroke depth before locking the nut down for production runs.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-20S the Right Cylinder?
When sizing this 140mm bore, dropping to a 125mm bore reduces the 0.5MPa push to 6135.9N, while stepping up to a 160mm bore increases it to 10053.1N. If your extend position never varies, a fixed-stroke ACQ cylinder is simpler and sufficient. To order, confirm the 140mm bore, 250mm full stroke, 20mm adjustable window, -S magnet, and the default female M22x2.5 rod-end 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 ACQJ140X250-20S FAQ
The usable extend range is 230-250mm (a 250mm full stroke shortened by up to a 20mm window). Force is identical to a standard ACQ: 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.
An external M27x2.0 threaded screw with a lock nut limits how far the rod extends, changing only the stroke length, not the piston area, so force is unchanged. The cylinder uses fixed NBR elastomer bumpers at each end for deceleration rather than adjustable air cushions, and the -S magnet works with reed or electronic switches.
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Related AirTAC ACQJ Compact Cylinders
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