This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X170, 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 SI63 Standard Cylinder SI63X170
The AirTAC Airtac SI63 Standard Cylinder SI63X170 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 170mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X170, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke170 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X170
- 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 SI63 Standard Cylinder SI63X170
The AirTAC SI63X170 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 170mm stroke, delivering 1559N push force at 0.5MPa through a G3/8 port. As an end-of-line unit, it is replaced by the SAI63X170 direct, matching the exact interface, bore, stroke, force, port and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-magnet SKU cannot take a sensor.
Airtac SI63 Standard Cylinder SI63X170 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X170 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X170 |
| Bore size | Ø63 mm |
| Stroke | 170 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI63X170 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAI63X170 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI63 Standard Cylinder SI63X170
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×170 | 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 SI63 Standard Cylinder SI63X170 Is Used
Clamp Actuation
Drives mid-sized machining clamps requiring 1559N push force at 0.5MPa to secure heavy workpieces during milling operations.
Package Diversion
Powers conveyor lane diverters and sorting gates where a 170mm stroke and 1402N pull force reliably redirect goods.
Pallet Lift Stops
Actuates pallet stops and positioning stops in automated storage systems, handling a safe 935N working load.
Replacing the Airtac SI63 Standard Cylinder SI63X170 with the SAI63X170
To replace the SI63X170, order the SAI63X170 direct, confirming the ISO 15552 mounting interface, 63mm bore, 170mm stroke, G3/8 port (PT/G/NPT) and mounting accessory. This non-magnet version cannot accept a CS1-B/DS1-B sensor; order a magnet-equipped SAI if position sensing is required. For sizing, a neighbouring 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X170
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI63 Standard Cylinder SI63X170 FAQ
Yes, the SI63X170 is discontinued. The direct replacement is the SAI63X170. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 170mm stroke, 1559N force, G3/8 port and mounting interface to fit existing fixtures.
The 63mm bore features a G3/8 port and delivers 1559N push / 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa. It operates at 30-800mm/s with a 30mm adjustable cushion.
Request a Quote for the SAI63X170
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X170 replacement — usually within 7-8 hours.