This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX40S, 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 SI100 Standard Cylinder SI100AX40S
The AirTAC SI100 Standard Cylinder SI100AX40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 40mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX40S
- 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 SI100 Standard Cylinder SI100AX40S
The AirTAC SI100AX40S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 40mm stroke. Delivering 3927 N push force at 0.5 MPa, it features a SUS420J2 stainless piston rod and a built-in magnet for CS1-B/DS1-B sensors. The direct replacement is the SAI100AX40S, which shares the same G1/2 port, M20x1.5 thread, and mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Note that plain cylinders drift without live air; for held loads, consider the SAIL or BSAI lock variants.
Airtac SI100 Standard Cylinder SI100AX40S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX40S |
| Bore size | Ø100 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI100AX40S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100AX40S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100AX40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×40 | 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 SI100 Standard Cylinder SI100AX40S Is Used
Heavy Press Clamping
Generates 3927 N of push force at 0.5 MPa to secure heavy metalwork during machining or stamping operations.
Pallet Positioning
Uses the short 40mm stroke and SUS420J2 stainless rod to push loaded pallets into exact alignment on washdown lines.
High-Force Diverting
Provides robust actuation to divert heavy goods or accumulate products on high-throughput material handling conveyors.
Replacing the Airtac SI100 Standard Cylinder SI100AX40S with the SAI100AX40S
To replace the SI100AX40S, order the SAI100AX40S. It is dimensionally interchangeable per ISO 15552, preserving the 100mm bore, 40mm stroke, G1/2 port, and 3927 N output. Retain your existing mounting hardware and confirm the -S magnet for current AirTAC switches. The -A rod denotes SUS420J2 stainless steel, ideal for moisture resistance over standard carbon steel. Neighbouring bores (80mm or 125mm) offer alternative force classes if fixture space allows. Remember, the air cushion only decelerates; it does not hold load. For drop prevention on air loss, specify the SAIL air-released lock or BSAI clamp-lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX40S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100AX40S FAQ
Yes, the SI100AX40S is discontinued. The direct replacement is the SAI100AX40S. It shares the identical ISO 15552 mounting interface, 100mm bore, 40mm stroke, output force, and G1/2 port, fitting directly into existing fixtures.
The G1/2 port bore delivers a push of 3927 N and pull of 3681 N at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N at 0.9 MPa, and a maximum theoretical force of 801 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX40S replacement — usually within 7-8 hours.