This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX145, 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 SI100BX145
The AirTAC Airtac SI100 Standard Cylinder SI100BX145 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 145mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX145, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX145
- 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 SI100BX145
The AirTAC SI100BX145 is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore and 145mm stroke. Built with an extruded aluminum barrel and a SUS304 stainless piston rod, it delivers 3927 N push force at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI100BX145. This current-production direct maintains the exact ISO 15552 mounting interface, bore, stroke, output force, and port size, fitting existing fixtures perfectly.
The SAI upgrade introduces an advanced piston seal with two Y-shaped one-way elements, ensuring long life and low start-up pressure. Note that this specific SKU lacks a magnet and cannot accept position sensors. If you require load holding on air loss, explore the SAIL or BSAI lock variants, as standard cushions only decelerate.
Airtac SI100 Standard Cylinder SI100BX145 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX145 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX145 |
| Bore size | Ø100 mm |
| Stroke | 145 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 SAI100BX145 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 SAI100BX145 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 SI100BX145
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×145 | 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 SI100BX145 Is Used
Heavy-Duty Pressing
Drives robust pressing and stamping operations requiring substantial force, utilizing the 3927 N push capacity at 0.5 MPa with a SUS304 rod for corrosion resistance.
Pallet Diversion
Actuates heavy pallet stops and diverter arms on high-throughput material handling lines, benefiting from the adjustable 36mm air cushions to soften end-of-stroke impacts.
Replacing the Airtac SI100 Standard Cylinder SI100BX145 with the SAI100BX145
To replace the discontinued SI100BX145, order the SAI100BX145. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the 145mm stroke, and the G1/2 port threads (PT, G, or NPT). Because this SKU has no magnet (-S), it cannot support legacy CS1-B/DS1-B sensors; if position detection is needed, select an SAI model with the magnet option. For sizing, this 100mm bore yields 3927 N push at 0.5 MPa; if less force is acceptable, an 80mm bore provides 2513 N. If your application requires holding a load without live air, a standard cylinder will drift—consider the SAIL air-released lock, the BSAI clamp-lock, or an external pilot check valve. The 145mm stroke is under 300mm, so rod-bending side loads are minimal, but always ensure proper guide alignment to maximize seal life.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX145
- ✓ 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 SI100BX145 FAQ
Yes, the AirTAC SI100BX145 is discontinued. The direct replacement is the SAI100BX145. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 145mm stroke, G1/2 port, and mounting interface. The SAI features an upgraded two Y-shaped element piston seal for lower start-up pressure.
This 100mm bore double-acting cylinder uses a G1/2 air port and a 25mm piston rod. The thrust output is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa. The operating speed range is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX145
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX145 replacement — usually within 7-8 hours.