Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-40SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-40SB 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 ACQJ125X250-40SB
The AirTAC ACQJ125X250-40SB is a double-acting, single-rod JIS compact cylinder from the big-bore range, featuring an external adjustable extend stop. A threaded rod with a lock nut limits extension, allowing you to fine-tune the end position on the machine between 210 and 250 mm without swapping parts. The retract stroke remains completely unaffected.
Because the piston area is unchanged, output force is identical to a standard ACQ of this bore, delivering 6135.9 N push and 5733.8 N pull at 0.5 MPa. The unit includes an M30x1.5 male rod-end thread (-B) for direct load coupling, a built-in piston magnet (-S) for electronic or reed switches, and fixed NBR elastomer bumpers at both ends for deceleration.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-40SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-40SB |
|---|---|
| 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 ACQJ125X250-40SB
| 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 ACQJ125X250-40SB Is Used
Press Tooling Setup
Dial in the exact clamping extension during press tooling setup, accommodating material thickness variations without machining new spacers.
Automotive Assembly Lines
Modify end-of-stroke positions on automotive assembly lines during vehicle model changeovers to meet new component dimensions.
Palletizing Stops
Adjust the extend distance on packaging palletizers to handle different pallet heights or product sizes on the fly.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-40SB the Right Cylinder?
When sizing this big-bore 125 mm unit, stepping down to a 100 mm bore yields 3927.0 N push at 0.5 MPa, while stepping up to a 140 mm bore provides 7696.9 N push. If your application requires a fixed extend position every cycle without variation, a standard ACQ cylinder without the external stop is sufficient. For this adjustable model, verify your ordering essentials: 125 mm bore, 250 mm full stroke, 40 mm adjuster window, plus the -S magnet and -B male thread options.
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 ACQJ125X250-40SB FAQ
This cylinder delivers 6135.9 N push and 5733.8 N pull at 0.5 MPa, 8590.3 N push at 0.7 MPa, and a maximum push of 1251 kgf at 1.0 MPa. The usable extend range is 210 to 250 mm (250 mm full stroke minus the 40 mm window).
The external M27x2.0 threaded stop with a lock nut limits the extend stroke length only; it does not change the piston area, so force remains identical to a standard ACQ. The cylinder uses fixed NBR bumpers for deceleration, and because it is a plain pneumatic cylinder, the rod will drift on air loss—use an external rod lock for fail-safe load holding.
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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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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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