This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X100CA, 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 SI40X100CA
The AirTAC Airtac SI40 Standard Cylinder SI40X100CA 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 SAI40X100CA, 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 → SAI40X100CA
- 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 SI40X100CA
The AirTAC SI40X100CA is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 100mm stroke. It delivers 628N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI40X100CA, matching the CA clevis mount, M12x1.25 rod thread and output force.
This SKU lacks a magnet (-S) and cannot accept a position switch. Upgrading to the SAI grants an improved piston seal (two Y-shaped elements for low start-up pressure). The SAI family also adds SAIL lock and SAIF valve variants.
Airtac SI40 Standard Cylinder SI40X100CA Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X100CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X100CA |
| 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 SAI40X100CA 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 SAI40X100CA 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 SI40X100CA
| 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 SI40X100CA Is Used
Component Clamping
Ideal for securing mid-weight machined parts during milling or drilling, utilizing the 628N push force at 0.5MPa to hold firm against cutting tools.
Package Diverting
Drives a 100mm stroke diverting arm on packaging lines to push cartons off the main belt, operating efficiently at 30-800mm/s.
Pallet Stops
Acts as a pneumatic stop gate for pallets entering a workstation, extending 100mm to block the 40mm bore path safely.
Replacing the Airtac SI40 Standard Cylinder SI40X100CA with the SAI40X100CA
To replace the SI40X100CA, order the SAI40X100CA. Confirm the ISO 15552 CA clevis mounting interface, 40mm bore, 100mm stroke, G1/4 port (PT/G/NPT thread options) and M12x1.25 rod end. Because this specific SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; order an -S variant if position feedback is required. For sizing alternatives, a 32mm bore yields 402N push at 0.5MPa, while a 50mm bore yields 982N. Note that a plain double-acting cylinder drifts on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL/BSAI lock variant for load holding. With a 100mm stroke, rod bending is negligible, but always guide external loads to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X100CA
- ✓ 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 SI40X100CA FAQ
Yes, the SI40X100CA is discontinued. The direct replacement is the SAI40X100CA. It features the same ISO 15552 mounting interface, 40mm bore, 100mm stroke, G1/4 port and CA clevis mount, fitting directly into existing fixtures.
This double-acting cylinder uses a G1/4 port. It delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical maximum of 128kgf at 1.0MPa. The piston rod is 16mm with an M12x1.25 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X100CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X100CA replacement — usually within 7-8 hours.