Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-30SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-30SB 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 ACQJ140X50-30SB
The AirTAC ACQJ140X50-30SB is a double-acting, single-rod JIS compact cylinder engineered for big-bore applications up to 300mm stroke. It features an external M27x2.0 threaded stop with a lock nut on the extend side, allowing you to fine-tune the extend end position directly on the machine. With a 50mm full stroke and a 30mm adjustment window, the usable extend range spans 20-50mm, while the retract stroke remains completely unaffected. The piston rod has a 32mm diameter and terminates in an M30x1.5 male thread (-B) for direct load coupling. A built-in piston magnet (-S) enables position sensing across both reed and solid-state electronic switches.
Because the internal piston area is unchanged, the output force is identical to a standard ACQ of this bore, delivering 7696.9N push and 7294.8N pull at 0.5MPa, with a maximum push capacity of 1570kgf at 1.0MPa. The cylinder relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. Operating pressure ranges from 0.15 to 1.0MPa, and the PT3/8 port ensures robust airflow for heavy-duty cycles.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-30SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-30SB |
|---|---|
| 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 ACQJ140X50-30SB
| 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 ACQJ140X50-30SB Is Used
Heavy Press Tonnage Setup
Dial in the exact extend end position on a 140mm bore metal stamping press to accommodate varying material thicknesses without machining new spacer blocks.
Automotive Welding Line Changeover
Quickly reposition the extend stop within the 20-50mm usable range during product changeover to locate welding fixtures accurately on the assembly line.
Palletizer Trial End Positions
Test different extend endpoints for a large-case palletizing robot to find the optimal push distance before finalizing the mechanical layout.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-30SB the Right Cylinder?
When sizing this 140mm bore model, consider the neighbouring bore options: the 125mm bore yields 6135.9N push, and the 160mm bore yields 10053.1N push at 0.5MPa. If your application requires a fixed 50mm extend stop without on-the-fly adjustments, a standard ACQ140X50 cylinder would suffice. To order, confirm the 140mm bore, 50mm full stroke, 30mm adjustment window, the -S magnet requirement, and the -B male rod thread. Note that a plain ACQ-type cylinder will not hold its load on air loss; for fail-safe holding, specify an external rod lock or pilot-operated check valve.
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 ACQJ140X50-30SB FAQ
The usable extend range is 20-50mm (a 50mm full stroke shortened by up to a 30mm window). The force equals a standard ACQ of this bore: 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 stop with a lock nut limits the extend stroke length only, meaning the output force remains unchanged. The cylinder uses a fixed NBR elastomer bumper at each end for deceleration rather than an adjustable air cushion, so for high-energy cycles you may need an external shock absorber.
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