Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-100S
The AirTAC SAIJ125X500-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 400 to 500 mm, allowing you to dial back the 500 mm nominal stroke by up to 100 mm during commissioning. This bore delivers 6136 N of push force at 0.5 MPa and reaches a maximum of 1251 kgf at 1.0 MPa. The rod is constructed from SUS420J2 stainless steel for enhanced durability against moisture.
Because the adjustment mechanism acts purely as a mechanical stop at the retract end, it cannot hold a load without continuous live air pressure. For position holding, consider the SAIL or BSAI series instead. This -S variant includes a magnet for CMSE reed and DMSE electronic sensors, which mount directly into the sensor grooves on both sides of the extruded aluminum barrel.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAIJ125AX500-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SAIJ125AX500-100S Is Used
Product Changeover
Quickly modify the retract end-stop by up to 100 mm on packaging lines when switching to different carton lengths, bypassing mechanical rebuilds.
Press Stroke Tuning
Dial in the exact 400 to 500 mm travel window during machine setup to accommodate varying material thicknesses without repositioning hardware.
Variable End Stops
Establish precise retract positions for multi-model assembly fixtures, using the rear screw to set distinct operational depths on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-100S the Right Cylinder?
Select this 125 mm bore when an 80 mm cylinder (providing 2513 N at 0.5 MPa) is insufficient, but a 160 mm bore is too large. The 100 mm adjustment range is ideal for machinery requiring frequent product-size changeovers, eliminating the need to physically swap cylinders or add external stops. It uses a PT tapered G1/2 port and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
With a 500 mm stroke, the 32 mm diameter rod is highly susceptible to side-loading forces; an external guide rail is recommended to prevent premature seal wear. This cylinder is dimensionally interchangeable with ISO 15552 cylinders, sharing the exact same mounting footprint.
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 SAIJ125AX500-100S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At its maximum operating pressure of 1.0 MPa, it delivers a peak push force of 1251 kgf.
The rear adjuster acts as a mechanical stop, allowing you to shorten the effective travel from the 500 mm nominal stroke down to 400 mm. This enables fine-tuning of the end position at commissioning, but it does not lock the load without live air.
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