The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX175-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 175mm 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 SAIJ50X175-50 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 50 mm. This creates a usable stroke window of 125 to 175 mm, letting you dial in the exact retract position during commissioning without adding external stops. It delivers 982 N of push thrust at 0.5 MPa and 1374 N at 0.7 MPa, fitting medium-force tasks perfectly.
This variant uses a SUS420J2 stainless steel rod (option A) for better corrosion resistance than standard carbon steel. The barrel is an extruded aluminum profile with sensor grooves on both sides. Note that the rear adjuster acts only as a travel stop for the air cushion to decelerate the load; it does not hold the load without live air pressure. For true load-holding, consider the SAIL or BSAI series.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX175-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 175 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. |
| ×175 | 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.
Quickly fine-tune the retract end position by up to 50 mm when switching product sizes on a packaging line, avoiding physical cylinder swaps.
Dial in the exact 125 to 175 mm travel window during commissioning to perfect a pressing or clamping distance without bolting on external stoppers.
The SUS420J2 stainless steel rod withstands moisture and mild chemicals better than carbon steel, making it suitable for general industrial assembly tasks.
Choose this 50 mm bore when 40 mm (628 N at 0.5 MPa) is too weak and 63 mm (1559 N) is unnecessarily large. The 50 mm bore uses a G1/4 port and operates at speeds of 30-800 mm/s. An adjustable stroke is ideal for product changeovers on a line where the retract distance needs quick fine-tuning, unlike a fixed-stroke SAI cylinder. To match this ISO 15552 replacement exactly, specify the 175 mm nominal stroke, 50 mm adjustment, PT tapered ports, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and no magnet.
Because the nominal stroke is 175 mm, the 20 mm rod and M16x1.5 thread handle moderate side loads well, but an external guide is recommended for heavy lateral forces.
Quick checklist
At 0.5 MPa operating pressure, it provides 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
The rear adjuster screw lets you shorten the 175 mm nominal stroke by up to 50 mm, creating a usable travel window of 125 to 175 mm. It acts as a mechanical stop for the cushion and does not lock the load without live air.
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