This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX100SH, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI50 Standard Cylinder SI50BX100SH
The AirTAC Airtac SI50 Standard Cylinder SI50BX100SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 100mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50BX100SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50BX100SH
- 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 SI50 Standard Cylinder SI50BX100SH
The AirTAC SI50BX100SH is a discontinued double-acting ISO 15552 profile cylinder featuring a 50mm bore, 100mm stroke, SUS304 stainless rod (-B), magnet (-S), and Viton H high-temperature seals (-H). It delivers 982 N push and 825 N pull at 0.5 MPa through a G1/4 port. The direct replacement is the SAI50BX100SH, sharing the same interface, force, and mounting fixtures.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The Viton H seal raises operating temperature to 0-150 C, and the built-in magnet supports legacy CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50BX100SH Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX100SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX100SH |
| Bore size | Ø50 mm |
| Stroke | 100 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 standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50BX100SH carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50BX100SH produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50BX100SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×100 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI50 Standard Cylinder SI50BX100SH Is Used
Hot End Ejection
Uses the Viton H seal and SUS304 rod to push parts at elevated ambient temperatures up to 150 C without seal degradation.
Diverting Arm
Provides a robust 982 N push at 0.5 MPa to deflect heavy packages on a sorting line with reliable double-acting motion.
Corrosive Fluid Clamps
The SUS304 stainless piston rod (-B) resists moisture and washdown chemicals while holding a fixture in place.
Replacing the Airtac SI50 Standard Cylinder SI50BX100SH with the SAI50BX100SH
To replace the SI50BX100SH, order the SAI50BX100SH. Verify the ISO 15552 mounting interface, 50mm bore, 100mm stroke, G1/4 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet enables current AirTAC switches (replacing legacy CS1-B/DS1-B), while the -B SUS304 rod and -H Viton seal must be specified. Sizing both ways: a 40mm bore yields 628 N push, whereas a 63mm bore yields 1559 N at 0.5 MPa. Note that a plain cylinder drifts on air loss as cushions only decelerate; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The 100mm stroke avoids rod-bending side-load issues seen over 300mm.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX100SH
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50BX100SH FAQ
Yes, the SI50BX100SH is discontinued. The direct replacement is the SAI50BX100SH. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 100mm stroke, G1/4 port, and mounting interface.
The G1/4 port feeds a 50mm bore generating 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and a theoretical max of 200 kgf at 1.0 MPa. It features a 20mm rod with an M16x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50BX100SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX100SH replacement — usually within 7-8 hours.