This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1000STC, 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 SI40X1000STC
The AirTAC Airtac SI40 Standard Cylinder SI40X1000STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1000mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1000STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1000 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1000STC
- 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 SI40X1000STC
The AirTAC SI40X1000STC is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 1000mm stroke. It delivers 628N push force at 0.5MPa and uses a G1/4 air port. The direct replacement is the SAI40X1000STC, matching the exact bore, stroke, force, port, and TC trunnion mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL lock, SAIF valve, and BSAI clamp-lock variants unavailable in the legacy SI line.
Airtac SI40 Standard Cylinder SI40X1000STC Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1000STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1000STC |
| Bore size | Ø40 mm |
| Stroke | 1000 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 SAI40X1000STC 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 SAI40X1000STC 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 SI40X1000STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1000 | 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 SI40X1000STC Is Used
Long-Stroke Diversion
Pushes packages across a 1-meter conveyor lane using the 628N thrust class, requiring external guides to prevent rod bending over the extended travel.
Vertical Material Lift
Raises lightweight totes up to 32kg in pick modules, relying on the TC trunnion mount to pivot safely under dynamic loading.
Pneumatic Slide Actuation
Drives a 1-meter tooling slide back and forth at 30-800mm/s, benefiting from the 27mm adjustable air cushions at both ends to decelerate the payload.
Replacing the Airtac SI40 Standard Cylinder SI40X1000STC with the SAI40X1000STC
To replace the SI40X1000STC, order the SAI40X1000STC. Verify the ISO 15552 TC trunnion mount, 40mm bore, 1000mm stroke, G1/4 port, and the -S magnet for CS1-B/DS1-B sensors. If you need less force, the 32mm bore offers 402N; for more, the 50mm bore provides 982N at 0.5MPa. Because this is a 1000mm stroke, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts without air; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1000STC
- ✓ 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 SI40X1000STC FAQ
Yes, the SI40X1000STC is discontinued. The direct replacement is the SAI40X1000STC. It is dimensionally interchangeable per ISO 15552, retaining the same 40mm bore, 1000mm stroke, TC mount, G1/4 port, and output force.
The 40mm bore features a G1/4 air port and M12x1.25 rod thread. It delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical maximum force of 128kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1000STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1000STC replacement — usually within 7-8 hours.