Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-20SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-20SB 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 ACQJ140X50-20SB
The AirTAC ACQJ140X50-20SB is a double-acting JIS compact cylinder engineered for big-bore applications, featuring a 140mm bore and a 32mm piston rod. An external M27x2.0 threaded stop with a lock nut precisely limits the extend end position, providing an adjustable window of 20mm. This allows operators to fine-tune the usable extend range from 30mm up to the full 50mm stroke directly on the machine, while the retract stroke remains completely unaffected.
Because the piston area is unchanged, the output force is identical to a standard ACQ of this size, delivering 7696.9N push and 7294.8N pull at 0.5MPa. The -SB configuration includes a built-in piston magnet compatible with reed or electronic solid-state switches, alongside a male M30x1.5 rod-end thread for direct load coupling. Fixed NBR elastomer bumpers absorb impact at both stroke ends, operating reliably at pressures from 0.15 to 1.0MPa.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-20SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-20SB |
|---|---|
| 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 ACQJ140X50-20SB
| 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 ACQJ140X50-20SB Is Used
Heavy Stamping Presses
Dial in the exact 30-50mm extend position during heavy-duty stamping setups, allowing operators to accommodate different die heights without machining custom spacers.
Automotive Assembly Lines
Adjust the end stop on the fly for product changeovers, securely positioning large automotive components using the M30x1.5 male rod end while handling the 1570kgf max push.
Large Fixture Calibration
Test and verify trial end positions on large welding fixtures, safely relying on the fixed NBR elastomer bumpers to absorb kinetic energy at the extend and retract limits.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-20SB the Right Cylinder?
Select this 140mm big-bore variant when substantial force is required within a compact footprint, as its maximum standard stroke reaches 300mm. If your application only requires a fixed 50mm extension without on-machine length tuning, a standard ACQ140X50 cylinder will suffice. When sizing pneumatically, note the neighbouring bores: scaling down to 125mm yields 6135.9N push @0.5MPa, whereas scaling up to 160mm provides 10053.1N. To order this exact adjustable model, confirm the 140mm bore, 50mm full stroke, 20mm window, -S magnet, and -B male rod 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 ACQJ140X50-20SB FAQ
This double-acting compact cylinder has a 140mm bore, a 50mm full stroke, and a 20mm adjustable window, yielding a usable extend range of 30-50mm. It generates 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. The port size is PT3/8.
The external M27x2.0 threaded stop with lock nut limits only the extend stroke length, meaning the output force remains identical to a standard ACQ of the same bore. The retract stroke is unaffected. The cylinder uses fixed elastomer bumpers rather than adjustable air cushions, so for high-speed or high-energy loads, an external shock absorber is recommended. Note that a plain cylinder does not hold its load on air loss; use an external rod lock for fail-safe holding.
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Related AirTAC ACQJ Compact Cylinders
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