Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-30S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-30S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke40 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-30S
The AirTAC ACQJ140X40-30S is a big-bore JIS compact cylinder featuring a double-acting single rod and an external extend stop. An M27x2.0 threaded adjuster with a lock nut lets you set the extend end position on the machine, providing a usable extend range of 10-40 mm from the 40 mm full stroke. The retract stroke remains unaffected. Because the piston area is unchanged, output force is identical to a standard ACQ of this bore.
Operating at 0.15-1.0 MPa, this Ø140 mm unit delivers 7696.9 N push and 7294.8 N pull at 0.5 MPa. It includes a -S piston magnet compatible with reed or electronic solid-state switches, and relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-30S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-30S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 40 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 ACQJ140X40-30S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×40 | 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 ACQJ140X40-30S Is Used
Press Tooling Setup
Dial in the exact clamping depth on heavy stamping presses during initial tool setup, using the external stop to find the perfect contact point without swapping spacers.
Product Changeover Stops
Accommodate different material thicknesses on a heavy-duty forming line by rotating the adjuster to shift the extend endpoint, minimizing downtime between production runs.
Heavy Load Positioning
Fine-tune the lowering endpoint for large assemblies on a lifting fixture, relying on the 1570 kgf maximum push capacity to hold position against gravity at the workface.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-30S the Right Cylinder?
Selecting this 140 mm bore provides 7696.9 N push at 0.5 MPa; dropping to a Ø125 bore lowers push to 6135.9 N, while a Ø160 bore raises it to 10053.1 N. If your extend end position never varies, a fixed-stroke ACQ cylinder is sufficient. When ordering, confirm the 40 mm full stroke, the 30 mm adjustment window, the -S magnet, and the default female M22x2.5 rod-end thread with PT3/8 port.
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 ACQJ140X40-30S FAQ
The usable extend range is 10-40 mm (a 40 mm full stroke shortened by up to a 30 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 maximum push is 1570 kgf at 1.0 MPa.
The external M27x2.0 threaded stop with lock nut limits only the extend stroke length; retract is unaffected and force remains unchanged. The cylinder uses fixed elastomer bumpers, not a brake. A plain ACQ-type does not hold its load on air loss, so for a fail-safe hold you must add an external rod lock or pilot-operated check valve.
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Related AirTAC ACQJ Compact Cylinders
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