Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-30S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-30S 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 ACQJ140X300-30S
The AirTAC ACQJ140X300-30S is a double-acting, single-rod JIS compact cylinder featuring a big 140mm bore and a 300mm full stroke. An external threaded stop with a lock nut restricts the extend end position, providing a usable outward range of 270 to 300 mm. The retract stroke remains completely unaffected by this adjustment. Because the piston area stays constant, output force equals that of a standard ACQ of identical size.
This big-bore variant delivers 7696.9 N of push force at 0.5 MPa, utilizing a 32mm piston rod and PT3/8 ports. It includes fixed NBR elastomer bumpers at both ends for end-of-travel deceleration rather than adjustable air cushions. Equipped with a piston magnet (-S), it supports both reed and solid-state electronic switches via its integrated mounting grooves.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-30S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-30S |
|---|---|
| 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 ACQJ140X300-30S
| 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 ACQJ140X300-30S Is Used
Heavy Press Tuning
Dialing in exact 270-300mm clamping depth on large metal-forming presses during tool setup, avoiding part replacement for minor position shifts.
Automotive Welding Stops
Adjusting extend end-stops for large robotic weld fixtures to accommodate varying chassis dimensions without re-engineering the entire pneumatic assembly.
Pallet Positioning
Fine-tuning the lift height of heavy pallet loads in automated storage systems, allowing quick adaptation for different pallet thicknesses on the fly.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-30S the Right Cylinder?
When sizing this unit, the neighboring big-bore option down is the 125mm bore (6135.9 N push @0.5 MPa), and the larger 160mm bore (10053.1 N push @0.5 MPa) sits above it. Choose this 140mm model if your application requires roughly 7697 N of thrust alongside precise 270-300mm extend tuning. If the exact 300mm end position is permanently fixed and never requires on-machine variation, a standard ACQ140X300 cylinder will suffice. Confirm your ordering essentials: 140mm bore, 300mm full stroke, 30mm 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 ACQJ140X300-30S FAQ
It delivers 7696.9 N push and 7294.8 N pull at 0.5 MPa, 10775.7 N push at 0.7 MPa, and a maximum push of 1570 kgf at 1.0 MPa. The usable extend range is 270-300 mm (300 mm full stroke minus the 30mm window).
The external M27x2.0 threaded stop with a lock nut limits only the extend length, leaving the retract stroke intact. Force is identical to a standard ACQ because the piston area is unchanged. The fixed elastomer bumper decelerates the load near stroke end, but a plain ACQ does not hold its load on air loss; for fail-safe holding, use an external rod lock or pilot-operated check valve.
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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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