Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-20SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke40 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-20SB
The AirTAC ACQJ125X40-20SB is a big-bore JIS compact pneumatic cylinder featuring a double-acting single rod and an external extend stop. A threaded adjuster with a lock nut lets you set the extend end position on the machine, yielding a usable extend range of 20-40mm from the 40mm full stroke. The retract stroke remains completely unaffected by this adjustment.
Because the piston area stays constant, output force is identical to a standard ACQ of this bore, delivering 6135.9N push at 0.5MPa. This big-bore variant supports up to 300mm strokes and includes NBR fixed elastomer bumpers at both ends. The -S magnet enables position sensing with reed or solid-state switches, while the -B male M30x1.5 rod end couples directly to your load.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-20SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 ACQJ125X40-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | 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 ACQJ125X40-20SB Is Used
Press Tooling Setup
Dial in the exact extend stop during press tooling setup to accommodate varying material thicknesses without machining new spacer blocks.
Automated Line Changeover
Speed up product changeover on automated assembly lines by rotating the external M27x2.0 adjuster to shift the end position for different part families.
Packaging Feed Stops
Adjust the extend stroke on packaging equipment to handle varying carton dimensions, using the 20mm tuning window to test trial end positions.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-20SB the Right Cylinder?
Selecting this 125mm bore provides 6135.9N push and 5733.8N pull at 0.5MPa. If your application requires less force, stepping down to a 100mm bore yields 3927.0N push, whereas a 140mm bore increases push to 7696.9N. A fixed-stroke ACQ suffices if your end position never varies, but this ACQJ variant is necessary for trial positioning. Confirm your ordering essentials: 125mm bore, 40mm full stroke, 20mm adjuster 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 ACQJ125X40-20SB FAQ
It delivers 6135.9N push and 5733.8N pull at 0.5MPa, 8590.3N push at 0.7MPa, and a maximum push of 1251kgf at 1.0MPa. The 40mm full stroke has a 20mm adjustable window, allowing the usable extend range to be set between 20mm and 40mm.
The external M27x2.0 threaded stop with lock nut limits the extend length without changing the piston area, so force remains identical to a standard ACQ. Deceleration relies on fixed NBR elastomer bumpers, not adjustable air cushions. Note that this cylinder will not hold its load on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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