
Flange Mount Ball Transfer Unit SI-30
Flange Mount Ball Transfer Unit SI-30 is a SI SD Series Ball Transfer Units item manufactured and shipped directly from Wuxi, China. It is ordered under model number SI-30. The published load capacity is 250kgs, with a maximum of 300kgs. The load ball is steel and the case is available in Steel & Galvanized, Steel & Chrome plating, Stainless Steel.
Manufactured by Tianhe Conveying Machine Co., Ltd, Wuxi, Jiangsu, China. Specification confirmed on drawing before production.
Published data for this model
| Model No. | SI-30 |
|---|---|
| Ball Material | steel |
| Case Material | Steel & Galvanized, Steel & Chrome plating, Stainless Steel |
| Load Capacity | 250kgs |
| Max Load Capacity | 300kgs |
| Weight | 1.1kgs |
| Ball Diameter | 30.16mm |
| Material | Carbon Steel, Stainless Steel(SUS304) |
Figures above are taken from the manufacturer's published data for this model. Values not listed are confirmed on drawing rather than estimated.
Where it is used
Plated carbon steel units in a wash-down bay fail from the inside: water sits in the support ball bed, rust forms under the plating and the ball stiffens long before the outside looks bad.
- Meat, dairy and beverage packing lines
- Chemical and pharmaceutical handling benches
- Marine and coastal installations
- Outdoor transfer plates exposed to rain
How to specify it
Stainless is specified for the environment, not the load; where both high load and corrosion resistance are needed, check the rating of the stainless model against the equivalent carbon steel unit, which is normally higher.
Ordering
Send the model number SI-30 with the quantity and destination country to [email protected]. We reply with price, lead time and a drawing to confirm before production.
Other SI SD Series models

Flange Mount Ball Transfer Unit SD-51
Load Capacity: 600kgs
Flange Mount Ball Transfer Unit SD-38
Load Capacity: 350kgs
Flange Mount Ball Transfer Unit SD-30
Load Capacity: 250kgs
Flange Mount Ball Transfer Unit SD-25
Load Capacity: 150kgs
Flange Mount Ball Transfer Unit SD-12
Load Capacity: 15kgs
Downward Mount Ball Transfer Unit SI-51
Load Capacity: 600kgsApplications and selection guidance
Frequently Asked Questions
What load can SI-30 carry?
The load capacity published for this model is 250kgs, with a maximum of 300kgs. Divide the package weight by the number of units actually in contact and apply an impact coefficient before deciding how many you need.
Which case materials are available for SI-30?
This model is listed with Steel & Galvanized, Steel & Chrome plating, Stainless Steel. Match the finish to the environment rather than the load: plating for dry indoor use, stainless for wash-down.
How do I order SI-30?
Send the model number SI-30 and the quantity to [email protected], or message us on the contact page. We reply with price, lead time and the drawing for confirmation.
Quote SI-30
Email the model and quantity; we reply with price, lead time and drawing.