Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-20
The AirTAC SAIJ125X100-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 20 mm. This yields a usable stroke window of 80-100 mm, enabling precise end-position tuning at commissioning without swapping out the hardware. Operating at 0.5 MPa, it provides a robust 6136 N of push thrust and 5734 N of pull force, making it well-suited for moving heavy loads.
The 32 mm carbon steel rod and M27x2 rod thread provide a rigid interface that handles high axial stresses, though long unsupported strokes still require external guidance. This unit uses PT tapered G1/2 ports and relies on a reduced mounting subset—Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting the FB, CA, CB, and CR options. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches, though this specific SKU is configured without a magnet.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125X100-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125X100-20 Is Used
Machine Changeover
Dial in the 80-100 mm travel window during product size transitions to set new end positions without physically replacing the cylinder or adding external stopper blocks.
Heavy Payload Positioning
Leverage the 6136 N of push force at 0.5 MPa to move heavy assemblies into their final retracted position, using the rear screw for final 0-20 mm micro-adjustments.
Assembly Line Tuning
Fine-tune the retraction end-stop during initial commissioning to perfect the timing and physical placement of heavy tooling on automated production lines.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-20 the Right Cylinder?
Choose this 125 mm bore when a 100 mm standard stroke requires exact 80-100 mm adjustability during machine setup or product changeover, avoiding the need to bolt on external stops. If your application requires less force, stepping down to an 80 mm bore yields 2513 N of push force at 0.5 MPa, whereas a larger 160 mm bore provides 10053 N for heavier tooling. Keep in mind the rear adjuster acts as a travel stop, not a lock; the SAIJ will not hold its load without live air pressure, so for load-holding requirements you should explore the SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 100 mm nominal stroke, 20 mm adjustment range, PT G1/2 port thread, and the specific mounting set. Because this model features a 100 mm stroke, side-load concerns are minimal, but always ensure the load is properly guided to protect the rod seals. For fixed-travel applications without the need for end-position tuning, the standard SAI series offers a direct alternative.
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 SAIJ125X100-20 FAQ
The rear adjuster screw acts as a mechanical stop that can shorten the nominal 100 mm stroke by up to 20 mm, providing a usable travel window of 80-100 mm. This allows you to fine-tune the end position at commissioning without changing the cylinder.
At an operating pressure of 0.5 MPa, this 125 mm bore double-acting cylinder generates a push force of 6136 N and a pull force of 5734 N. It can deliver up to 1251 kgf at its maximum 1.0 MPa 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 SAIJ125X100-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.