Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-10S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-10S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke300 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-10S
The ACQJ140X300-10S is a big-bore JIS compact cylinder with a 140 mm bore and 300 mm full stroke, featuring a double-acting single rod. An external M27x2.0 threaded stop and lock nut restricts the EXTEND end position, giving a usable extension range of 290 to 300 mm. The RETRACT stroke remains completely unaffected by this adjustment.
Because the piston area is unchanged, the force output is identical to a standard ACQ of this size, delivering 7696.9 N push and 7294.8 N pull at 0.5 MPa. The cylinder body is fitted with a fixed NBR elastomer bumper at each end for end-of-stroke deceleration. The -S suffix indicates a built-in piston magnet compatible with both reed and electronic solid-state magnetic switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-10S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-10S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 300 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 ACQJ140X300-10S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×300 | 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 ACQJ140X300-10S Is Used
Heavy Press Tonnage Calibration
Dial in the exact 290-300 mm extend position during heavy press setup, allowing operators to tune tonnage without machining custom spacer blocks.
Automotive Welding Line Changeover
Shift the extend stop on the fly when swapping automotive welding fixtures, accommodating different part heights without replacing the cylinder.
Large Assembly Press End-Position
Test and establish trial end positions on large assembly presses, tweaking the 10 mm window to find the optimal seating depth for new components.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-10S the Right Cylinder?
When sizing this model, the adjacent standard bore down is 125 mm (6135.9 N push @0.5 MPa) and up is 160 mm (10053.1 N push @0.5 MPa). If your application requires a fixed extension length without ever needing on-the-fly changes, a standard ACQ series cylinder will suffice. To order, confirm the 140 mm bore, 300 mm full stroke, 10 mm adjustment window, the -S magnet option, 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 ACQJ140X300-10S FAQ
The usable extend range is 290-300 mm (300 mm full stroke minus the 10 mm window). Force is identical to a standard ACQ: push is 7696.9 N and pull is 7294.8 N at 0.5 MPa, push is 10775.7 N at 0.7 MPa, and max push is 1570 kgf at 1.0 MPa.
The external M27x2.0 threaded stop with lock nut limits the extend stroke only; force remains unchanged because the piston area is not altered. The cylinder uses a fixed NBR elastomer bumper, not an adjustable air cushion. Note that a plain compact cylinder does not hold its load on air loss; for fail-safe holding, install an external rod lock or pilot-operated check valve.
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Related AirTAC ACQJ Compact Cylinders
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