Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-40
The AirTAC SAIJ125 Adjustable Cylinder SAIJ125X100-40 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ125 mm
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-40
By incorporating a 40mm adjustment range, this unit allows the effective travel to be dialed back from its 100mm nominal length, creating a precise 60-100mm usable window. This fine-tuning capability is ideal for optimizing end positions during commissioning without the need to physically swap out the cylinder.
The extruded aluminum barrel features sensor grooves on both sides, ready to accept CMSE or DMSE switches if a magnet is specified later. It uses a PT tapered port thread and a robust 32mm carbon steel rod with an M27x2 thread, providing high rigidity against side loads. The mounting hardware is limited to the SAIJ subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-40 |
|---|---|
| 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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | — |
| Max (@1.0 MPa) | 1169 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-40
| 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 SAIJ125X100-40 Is Used
Variable End-Stop Positioning
Dial in the exact retraction point within the 60-100mm window to accommodate different material thicknesses or tooling lengths without changing the cylinder.
Machine Changeover
Quickly adjust the stroke length during product line changeovers by turning the rear screw, drastically reducing setup time and eliminating the need for external stopper blocks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-40 the Right Cylinder?
The adjustable stroke is chosen over a fixed SAI cylinder when a process requires variable end-stops or frequent product-size changeovers, allowing operators to reposition the stopper mechanically rather than adding external physical stops.
For replacement, ensure the ISO 15552 footprint matches your existing mount, verify the 100mm nominal stroke, and confirm the PT port thread. Because the rear adjuster acts only as a travel stop and the air cushions handle deceleration, this cylinder will not hold a load without live air pressure. If your application requires true load-holding, consider the SAIL or BSAI series instead. Furthermore, while the 32mm rod handles substantial stress, any stroke over 300mm on larger bores requires external guide rails to prevent binding.
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 SAIJ125X100-40 FAQ
If pressure is increased to 0.7MPa, the push force rises to 8590N.
The rear adjuster acts as a mechanical stop that shortens the effective travel. For this 100mm nominal stroke cylinder, the -40 code means you can trim the stroke by up to 40mm, resulting in a usable travel window of 60 to 100mm.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.