Flange Mount Ball Transfer Unit SI-38
The SI-38 is a flange mount ball transfer unit with a 30.16 mm diameter steel ball, rated for 250 kg working load and 300 kg maximum load. It is designed to be bolted through a flange onto a deck plate, allowing heavy flat or smooth objects like trays to be moved and rotated in any direction by hand. The unit weighs 1.4 kg and is available in carbon steel, galvanized steel, chrome-plated steel, or stainless steel (SUS304) case with a steel ball.
Product Overview
The SI-38 is a flange mount ball transfer unit with a 30.16 mm diameter steel ball, rated for 250 kg working load and 300 kg maximum load. It is designed to be bolted through a flange onto a deck plate, allowing heavy flat or smooth objects like trays to be moved and rotated in any direction by hand. The unit weighs 1.4 kg and is available in carbon steel, galvanized steel, chrome-plated steel, or stainless steel (SUS304) case with a steel ball.
Part of the SI SD Series range, used in Warehouse and Distribution Centres.
Key Benefits
- Carries 250 kg per unit in normal service and 300 kg at peak load
- Flange mount allows secure bolt-on installation and easy removal for maintenance
- 30.16 mm diameter steel ball provides stable rolling under heavy static and dynamic loads
- Available in carbon steel, galvanized, chrome-plated or stainless steel for different environmental conditions
- Compact 76 x 62 mm dimension fits into tight deck spaces without compromising load capacity
Application Scenarios
- Transfer points between two conveyor lines running at right angles in a warehouse or factory
- Loading tables for heavy trays or flat components entering a processing or packaging station
- Assembly line workstations where a fixture or tray must be rotated by hand
- Curved work surfaces on band saws or router tables requiring omnidirectional movement
- Feeding systems where flat items need to be repositioned without powered diverters
Who It Is For
- Conveyor system integrators building high-load transfer and rotation points
- Material handling equipment builders designing decks for heavy flat loads
- Industrial distributors stocking ball transfer units by load rating and mounting type
- Assembly line builders needing reliable manual repositioning of fixtures
- Packaging machinery contractors integrating transfer units into feeding systems
Problems It Solves
- Heavy flat loads that bind or jam when pushed across a fixed deck plate
- Transfer points where product must change direction without powered guidance
- Operators struggling to rotate or align heavy trays by hand at the end of a line
- Decks requiring consistent load capacity across multiple transfer points
- Need for a durable, bolt-on unit that can be replaced without replacing the entire deck
Technical Features
- Steel ball with 30.16 mm diameter for high load capacity and smooth rolling
- Flange mount with two screw holes for secure attachment to deck plate
- Housing made from carbon steel, galvanized steel, chrome-plated steel, or stainless steel (SUS304)
- 300 kg maximum load capacity for peak or impact loading situations
- Compact 76 x 62 mm overall dimension for space-constrained deck designs
Materials
- Carbon steel case and ball for general industrial use
- Galvanized steel case for improved corrosion resistance in damp environments
- Chrome-plated steel case for enhanced wear resistance and appearance
- Stainless steel (SUS304) case and ball for washdown, food, or corrosive environments
Quality Control
- Load capacity verified against the 250 kg working load rating
- Ball rotation tested by hand for free movement in all directions
- Material grade confirmed against the case and ball option ordered
Customization Options
- Case material selected between carbon steel, galvanized steel, chrome-plated steel, or stainless steel (SUS304)
- Ball material is steel, with no alternative material listed
- Other models in the SI SD Series available for different load ratings or mounting types
Use Guide
- Divide the total load by the number of units in contact to ensure each unit stays under 250 kg working load
- Keep peak or impact loading below the 300 kg maximum load capacity
- Mount units on a flat, rigid deck plate so all balls sit at the same height
- Choose stainless steel case and ball where the deck is exposed to washdown or corrosive conditions
- Avoid using on uneven or soft-bottomed items such as cloth-wrapped loads
Specifications
| Model No | SI-38 |
|---|---|
| Mounting | Flange mount |
| Load Capacity | 250 kg |
| Max Load Capacity | 300 kg |
| Weight | 1.4 kg |
| Ball Diameter | 30.16 mm |
| Ball Material | Steel |
| Case Material | Carbon steel, galvanized steel, chrome-plated steel, stainless steel (SUS304) |
| Mount Diameter | 58 mm |
| Dimensions | 76 x 62 mm |
Manufacturing Process
Step 1
Machining of the flange and case body
Step 2
Assembly of the steel ball and support mechanism
Step 3
Drilling and finishing of mounting holes
Step 4
Final load check and packaging
Compared With Other Options
| Press fit ball transfer units | Flange mount allows bolt-on installation and removal for maintenance, while press fit units are faster to install but harder to replace |
|---|---|
| Lower rated SI Series units | The SI-38 suits 250 kg loads, so lighter applications are better served by a smaller unit that rolls with less effort |
| Downward mount ball transfer units | Flange mount fixes the unit from above, while downward mount units are installed from below and may require deck access |
Flange Mount Ball Transfer Unit SI-38 Questions
What load can one SI-38 ball transfer unit carry?
The rated load capacity is 250 kg per unit and the maximum load capacity is 300 kg.
How is the SI-38 mounted?
It is a flange mount unit, so it is bolted through the flange onto the deck plate.
Which case material should I choose?
Carbon steel for general use, galvanized or chrome-plated for better corrosion resistance, stainless steel (SUS304) for washdown or corrosive environments.
Is a stainless steel version available?
Yes, the case and ball can be supplied in stainless steel (SUS304).
How much does the unit weigh?
Each SI-38 weighs 1.4 kg, which is used for deck load and shipping calculations.
Can I get other load ratings in the same series?
Yes, other models in the SI SD Series are available for different load ratings.
Get a Price for Flange Mount Ball Transfer Unit SI-38
Send the quantity and any material or surface option you need, and a quotation comes back against this model number.