This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X100SCA, 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 SI40 Standard Cylinder SI40X100SCA
The AirTAC Airtac SI40 Standard Cylinder SI40X100SCA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 100mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X100SCA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X100SCA
- 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 SI40 Standard Cylinder SI40X100SCA
The AirTAC SI40X100SCA is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 100 mm stroke. It delivers 628 N push force at 0.5 MPa via a G1/4 port. The direct replacement is the SAI40X100SCA, matching the exact bore, stroke, force, port, and CA mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. For applications needing load holding, the SAI family adds SAIL and BSAI lock variants the SI lacked. The -S magnet works with CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40X100SCA Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X100SCA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X100SCA |
| Bore size | Ø40 mm |
| Stroke | 100 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI40X100SCA carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAI40X100SCA produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI40 Standard Cylinder SI40X100SCA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | 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 SI40 Standard Cylinder SI40X100SCA Is Used
Clamping Fixtures
Provides reliable 628 N clamping force at 0.5 MPa for securing mid-weight machined components during milling or drilling operations.
Package Diverting
Actuates diverting arms on 100 mm strokes to redirect moderate cartons on packaging lines, operating efficiently at 30-800 mm/s.
Vertical Lift Gates
Lifts access gates or light material shelves up to 32 kg using the 40 mm bore, utilizing the CA clevis mount for pivoting motion.
Replacing the Airtac SI40 Standard Cylinder SI40X100SCA with the SAI40X100SCA
To replace the SI40X100SCA, order the SAI40X100SCA. It is dimensionally interchangeable per ISO 15552, keeping the 40 mm bore, 100 mm stroke, M12x1.25 rod thread, G1/4 port, and CA clevis mounting. The built-in -S magnet accepts CS1-B/DS1-B switches (the SAI uses current AirTAC switches). For sizing, a 32 mm bore offers 402 N push at 0.5 MPa, while a 50 mm bore yields 982 N. Note: a plain cylinder drifts on air loss; the air cushion only decelerates. For held loads, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. If exploring self-valve options, the SAIF (bores 32-100) integrates a 4M valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X100SCA
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI40 Standard Cylinder SI40X100SCA FAQ
Yes, the SI40X100SCA is discontinued. The direct replacement is the SAI40X100SCA. It shares the identical ISO 15552 mounting interface, 40 mm bore, 100 mm stroke, G1/4 port, and CA clevis mount, fitting directly into existing fixtures.
The 40 mm bore features a G1/4 air port and M12x1.25 rod thread. It generates 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, 1130 N push at 0.9 MPa, and a theoretical max of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X100SCA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X100SCA replacement — usually within 7-8 hours.