Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke250 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75SB
The ACQJ125X250-75SB is a double-acting JIS compact cylinder from AirTAC's big-bore range, featuring a 125mm bore and 250mm full stroke. An external M27x2.0 threaded stop with a lock nut limits the extend end position, providing a usable extend range of 175-250mm. The retract stroke remains unaffected. Because the piston area is unchanged, output force is identical to a standard ACQ of this size.
This model delivers 6135.9N push and 5733.8N pull at 0.5MPa, with a maximum push capacity of 1251kgf at 1.0MPa. It includes a -S magnet for electronic or reed switches, a -B male M30x1.5 rod end, and fixed NBR elastomer bumpers at each end. Operating pressure spans 0.15-1.0MPa, with a speed range of 30-500mm/s.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 250 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 ACQJ125X250-75SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×250 | 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 ACQJ125X250-75SB Is Used
Press Tonnage Tuning
Dial in exact 175-250mm extend positions on heavy stamping presses to accommodate varying material thicknesses without machining new stop collars.
Automotive Welding Line Changeover
Rapidly reposition clamping stops during vehicle model changeovers on welding assembly lines using the external M27x2.0 adjuster.
Large Pallet Forming Stops
Test different end positions on large-case packaging machinery to find the optimal sealing stroke for varied pallet dimensions.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-75SB the Right Cylinder?
When sizing this 125mm bore actuator, note the 6135.9N push force at 0.5MPa. Stepping down to an ACQJ100 bore yields 3927.0N push, while stepping up to an ACQJ140 bore provides 7696.9N push. If your extend end position never varies, a fixed-stroke ACQ125 cylinder suffices. To order the ACQJ125X250-75SB, confirm the 125mm bore, 250mm full stroke, 75mm 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 ACQJ125X250-75SB FAQ
At 0.5MPa, push force is 6135.9N and pull force is 5733.8N. At 0.7MPa, push is 8590.3N. The maximum push is 1251kgf at 1.0MPa. The full stroke is 250mm, the adjustable window is 75mm, and the usable extend range is 175-250mm.
No. The external threaded stop changes the extend stroke length only, leaving piston area and force unchanged. The cylinder uses fixed NBR elastomer bumpers at each end, not adjustable air cushions. The included -S magnet works with reed or solid-state switches.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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