This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X37.7S, 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 SI32 Standard Air Cylinder SI32X37.7S
The AirTAC SI32 Standard Air Cylinder SI32X37.7S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 38mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X37.7S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke38 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X37.7S
- 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 SI32 Standard Air Cylinder SI32X37.7S
The AirTAC SI32X37.7S is a discontinued double-acting ISO 15552 profile cylinder featuring a 32mm bore, 37.7mm stroke, and a built-in piston magnet for CS1-B/DS1-B switches. It delivers 402N push and 345N pull at 0.5 MPa through a G1/8 port. AirTAC replaced this end-of-line unit with the SAI32X37.7S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI successor introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For applications needing load holding, the SAI family adds SAIL, SAIF, and BSAI variants absent in the SI line.
Airtac SI32 Standard Air Cylinder SI32X37.7S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X37.7S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X37.7S |
| Bore size | Ø32 mm |
| Stroke | 38 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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 1000 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI32X37.7S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
The SAI32X37.7S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI32 Standard Air Cylinder SI32X37.7S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×38 | 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 SI32 Standard Air Cylinder SI32X37.7S Is Used
Small Part Ejection
Uses the 402N push force at 0.5 MPa to reliably push lightweight molded components out of a machining fixture.
Compact Clamping
Fits into tight assembly cells where the 32mm bore profile and short 37.7mm stroke provide precise holding without excessive travel.
Sensor Diverting
Leverages the -S magnet and CS1-B/DS1-B switches to confirm position when actuating small pneumatic diverter gates.
Replacing the Airtac SI32 Standard Air Cylinder SI32X37.7S with the SAI32X37.7S
To replace the SI32X37.7S, order the SAI32X37.7S. Confirm the ISO 15552 mounting interface, the 32mm bore, the 37.7mm nonstandard stroke, the G1/8 port (PT/G/NPT thread options), and the -S magnet. If you need to scale, the neighboring 40mm bore yields 628N push at 0.5 MPa, while dropping down is not standard below 32mm. Because 37.7mm is a nonstandard stroke, verify fixture clearance. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. The SAI family also offers the SAIF integrated 4M valve (bores 32-100) if you need self-contained control.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X37.7S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI32 Standard Air Cylinder SI32X37.7S FAQ
Yes, the SI32X37.7S is discontinued. The direct replacement is the SAI32X37.7S. It features the same ISO 15552 mounting interface, 32mm bore, 37.7mm stroke, output force, G1/8 port, and mounting accessories, fitting directly into existing fixtures.
This double-acting cylinder has a 32mm bore, 12mm rod, M10x1.25 rod thread, 27mm adjustable cushion, and operates at 30-800 mm/s. Force ratings are: 402N push / 345N pull at 0.5 MPa, 563N push at 0.7 MPa, 724N push at 0.9 MPa, and a theoretical max of 82 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X37.7S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X37.7S replacement — usually within 7-8 hours.