Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-40SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-40SB 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 ACQJ140X50-40SB
The AirTAC ACQJ140X50-40SB is a big-bore JIS compact pneumatic cylinder engineered for double-acting operation with an external extend stop. An M27x2.0 threaded adjuster and lock nut let you fine-tune the forward end position on the machine, yielding a usable extend range of 10-50 mm from the 50 mm full stroke. The retract stroke remains completely unaffected by this mechanism.
Because the piston area stays constant, output force matches a standard ACQ exactly, delivering 7696.9 N push and 7294.8 N pull at 0.5 MPa. This SB configuration includes a male M30x1.5 rod end for direct load coupling and a built-in magnet (-S) compatible with reed or solid-state switches. Deceleration relies on fixed NBR elastomer bumpers rather than adjustable air cushions.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-40SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-40SB |
|---|---|
| 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 ACQJ140X50-40SB
| 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 ACQJ140X50-40SB Is Used
Press Tooling Changeover
Adapts heavy press end positions rapidly during product family changeovers without machining new spacer blocks.
Large Fixture Calibration
Dials in the exact clamping reach on oversized machining fixtures during prototype setup and first-article inspection.
Material Lift Positioning
Sets precise elevation stops for heavy pallet lifts in automated warehousing systems where heights vary by SKU.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-40SB the Right Cylinder?
Selecting this 140 mm bore actuator involves balancing massive thrust with spatial constraints. If 527.8 N pull at 0.5 MPa from a 40 mm bore is insufficient, stepping up to this size provides 7294.8 N pull, while the 160 mm alternative offers 9424.8 N pull. A fixed-stroke ACQ suffices if your end position never requires shifting. Confirm your ordering essentials: 140 mm bore, 50 mm full stroke, 40 mm 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 ACQJ140X50-40SB 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 10-50 mm, created by a 40 mm adjustment window on a 50 mm full stroke.
The external M27x2.0 stop screw limits forward travel without altering piston area, so force remains identical to a standard ACQ. Fixed NBR bumpers decelerate the load near stroke ends. Note that a plain ACQ-type does not hold its load on air loss; for fail-safe holding, install an external rod lock or pilot-operated check valve.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
Request a Quote for Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X50-40SB
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.