The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX210-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 210mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
The AirTAC SAIJ50X210-75 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 75 mm. This yields a usable end-position window of 135 to 210 mm, providing immense flexibility during machine commissioning or product changeovers without needing to physically swap the cylinder or bolt on external stops. It delivers a robust 982 N of push force at 0.5 MPa, making it well-suited for medium-duty handling tasks.
This specific configuration incorporates a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback integration. It uses a G1/4 port, features M16x1.5 rod threading, and operates at speeds between 30 and 800 mm/s.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX210-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 210 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×210 | 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.
Dial in the exact retract distance between 135 and 210 mm during machine setup to accommodate new fixture heights without changing out the actuator.
Quickly adjust the stroke length on packaging or conveying lines to handle different box or pallet dimensions on the fly.
Leverage the 982 N push force at 0.5 MPa for pressing or clamping components, using the rear stop to precisely limit the travel distance.
Choose this 50 mm bore cylinder when your application requires 982 N of push force at 0.5 MPa; stepping down to a 40 mm bore drops the push force to 628 N, while stepping up to a 63 mm bore increases it to 1559 N. An adjustable-stroke SAIJ is preferred over a fixed-stroke SAI when you need to fine-tune the retract end-position on the fly or accommodate varying product sizes on the same line. Remember that the rear adjuster acts purely as a mechanical stop to set the travel limit and does not hold the load without live air pressure; if your application requires true load-holding without continuous air supply, consider the SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 50 mm bore, 210 mm nominal stroke, 75 mm adjustment range, PT tapered port threads, and the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 210 mm stroke approaches the mid-range of standard lengths, ensure your mounting configuration provides adequate support to prevent excessive rod side-loading.
Quick checklist
At a 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At the maximum operating pressure of 1.0 MPa, it can deliver up to 200 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 210 mm nominal stroke by up to 75 mm. This creates a usable travel window of 135 to 210 mm, allowing you to fine-tune the end position at commissioning without adding external stops.
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