Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-20S
The AirTAC SAIJ125X105-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to 85 mm from its 105 mm nominal stroke. Delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa, it handles heavy positioning tasks. This variant includes a standard -S magnet for CMSE reed and DMSE electronic sensors.
The rear adjuster acts purely as a mechanical stop to set the end-of-travel position and relies on the variable air cushions for deceleration; it does not lock or hold the load without live air pressure. This extruded aluminum barrel design omits the FB, CA, CB, and CR mounts, supporting a focused mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 105 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 SAIJ125X105-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×105 | 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 SAIJ125X105-20S Is Used
Variable End-Stop Tuning
Dial in the exact 85 to 105 mm travel distance during machine commissioning to accommodate new product sizes without replacing the cylinder.
Heavy Assembly Changeover
Leverage the 6136 N push force to move heavy pallets while making quick 20 mm adjustments to the rear stop for different pallet widths.
Sensor-Ready Positioning
Utilize the built-in -S magnet with DMSE solid-state sensors to confirm exact end positions while trimming the stroke to match tooling offsets.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-20S the Right Cylinder?
Choose this 125 mm bore when 80 mm (2513 N push at 0.5 MPa) is too weak for your product changeover or setup tasks, but before stepping up to a 160 mm bore (10053 N push at 0.5 MPa) which adds unnecessary bulk. The 20 mm adjustment window is ideal for dialing in exact end stops during commissioning without swapping hardware. For load-holding without continuous air pressure, select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead of relying on the SAIJ stopper. This unit features a PT tapered port and a 32 mm carbon steel rod.
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 SAIJ125X105-20S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach a maximum push force of 1251 kgf at 1.0 MPa.
The rear mechanical adjuster allows you to shorten the 105 mm nominal stroke by up to 20 mm, creating an 85 to 105 mm usable travel window. The adjuster functions as a travel stop and does not hold 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 SAIJ125X105-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.