This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX135, 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 SI100BX135
The AirTAC Airtac SI100 Standard Cylinder SI100BX135 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 135mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX135, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke135 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX135
- 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 SI100BX135
The AirTAC SI100BX135 is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore, 135mm stroke, and a SUS304 stainless piston rod. Delivering 3927N push force at 0.5MPa, it is replaced by the SAI100BX135 direct upgrade. This successor maintains the exact G1/2 port, M20x1.5 thread, and mounting interface, fitting existing fixtures seamlessly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors. The cushion only decelerates; use SAIL or BSAI variants for load holding.
Airtac SI100 Standard Cylinder SI100BX135 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX135 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX135 |
| Bore size | Ø100 mm |
| Stroke | 135 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 SAI100BX135 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 SAI100BX135 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 SI100BX135
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×135 | 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 SI100BX135 Is Used
Heavy Stamping
Drives robust pressing arms in automated lines, utilizing the 3927N push force at 0.5MPa for consistent metal forming.
Pallet Diversion
Actuates heavy-duty lane diverters to route loaded pallets, relying on the 100mm bore for high thrust requirements.
Guided Lifting
Raises 200kg vertical loads in material handling gates, requiring external guidance to prevent rod bending on the 135mm stroke.
Replacing the Airtac SI100 Standard Cylinder SI100BX135 with the SAI100BX135
To replace the SI100BX135, order the SAI100BX135. Verify the ISO 15552 mounting interface, 100mm bore, 135mm stroke, G1/2 port, and SUS304 rod. Lacking a magnet, this SKU cannot take sensors. If sizing up or down, neighbor bores offer different force classes; this bore yields 3927N push at 0.5MPa. The cushion only decelerates, so for load holding select the SAIL lock, BSAI clamp-lock, or an external pilot check valve. The SAIF variant integrates a 4M valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX135
- ✓ 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 SI100BX135 FAQ
Yes, the SI100BX135 is discontinued. The direct replacement is the SAI100BX135, a current ISO 15552 cylinder retaining the same 100mm bore, 135mm stroke, G1/2 port, and mounting interface.
The G1/2 port bore provides 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX135
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX135 replacement — usually within 7-8 hours.