Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 180mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke180 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-50
The AirTAC SAIJ125X180-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 180 mm travel back by up to 50 mm, creating a precise 130-180 mm usable window. Delivering 6136 N of push force at 0.5 MPa, it is built to handle heavy loads with a robust 32 mm carbon steel rod and an M27x2 thread. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This adjustable design allows you to fine-tune end positions at commissioning without swapping hardware or adding external stops. The rear adjuster acts purely as a travel stop and works alongside the 40 mm variable air cushions at both ends to decelerate the load. It supports a standard speed range of 30-500 mm/s and uses PT tapered G1/2 porting for reliable pneumatic connections.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 180 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×180 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-50 Is Used
Machine Changeover
Dial in the 130-180 mm travel window during product size changes to set new end positions without machining new hard stops.
Heavy Pressing
Leverage 6136 N of thrust at 0.5 MPa for pressing assemblies while using the rear screw to fine-tune the final contact position.
Variable End Stops
Adjust the retract position on the fly during commissioning to accommodate fixture tolerances and varying material thicknesses.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-50 the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (3927 N at 0.5 MPa) lacks the thrust for your heavy-duty tooling, but a 160 mm bore (10053 N) would be excessive. The 50 mm adjustment range is ideal for product changeovers on a line where end-of-stroke positions shift slightly between fixtures. Since the stroke is 180 mm, you do not need external guides for side-load support, though you should ensure the mount can handle the weight.
Remember that the rear adjuster is a stop, not a lock; the SAIJ125X180-50 will not hold its position without live air pressure. For drop-prevention, consider the SAIL or BSAI series. To replace an ISO 15552 cylinder, match the 125 mm bore, 180 mm stroke, 50 mm adjustment, PT G1/2 port, and the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). No magnet is specified for this configuration.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-50 FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa the push force increases to 8590 N, and it reaches a maximum of 11045 N at 0.9 MPa.
A rear external screw acts as a stopper, allowing you to shorten the 180 mm nominal stroke by up to 50 mm, resulting in a 130-180 mm usable travel window. It acts as a travel stop and does not lock the load without live air pressure.
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 SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.