Flange Mount Ball Transfer Unit SI-30
The SI-30 is a flange mount ball transfer unit with a 30.16 mm diameter steel main 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 or workbench so that flat, smooth objects like trays can be pushed and rotated in any direction by hand. The unit weighs 1.1 kg and is available with a steel, galvanized steel, chrome-plated steel, or stainless steel case.
Product Overview
The SI-30 is a flange mount ball transfer unit with a 30.16 mm diameter steel main 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 or workbench so that flat, smooth objects like trays can be pushed and rotated in any direction by hand. The unit weighs 1.1 kg and is available with a steel, galvanized steel, chrome-plated steel, or stainless steel case.
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 attachment and easy removal for maintenance
- Steel main ball provides high load capacity and durability
- Available in multiple case materials to suit dry, wet or corrosive environments
- 30.16 mm ball diameter ensures smooth movement under heavy static load
Application Scenarios
- Transfer points between two conveyor lines running at right angles
- Assembly stations where a heavy tray or fixture needs to be rotated by hand
- Workbenches feeding a press brake, laser cutter or CNC machine
- Packaging lines where trays are repositioned for labeling or sealing
- Material handling decks where flat, rigid items must be moved in any direction
Who It Is For
- Conveyor system integrators designing transfer and rotation points
- Industrial equipment builders constructing workbenches and processing tables
- Warehouse automation contractors installing load transfer points
- Production line builders needing consistent ball transfer units by load rating
- Industrial distributors stocking high-load ball transfer units in volume
Problems It Solves
- Heavy flat loads that jam when pushed across a fixed deck plate
- Transfer points where product must change direction without powered diverters
- Operators struggling to rotate or align a tray or fixture by hand
- Inconsistent mounting methods when assembling units from multiple suppliers
- Lack of a single-source solution for flange mount ball transfer units with defined load ratings
Technical Features
- 30.16 mm diameter steel main ball for high load and wear resistance
- Flange mount with two screw holes for secure attachment to deck plate
- Steel case with optional galvanizing, chrome plating or stainless steel finish
- 300 kg maximum load capacity for short-term peak loading
- Unit weight of 1.1 kg for deck load and shipping calculations
Materials
- Carbon steel ball and case for general industrial use
- Galvanized steel case for improved corrosion resistance in humid environments
- Chrome-plated steel case for enhanced wear and appearance
- Stainless steel case (SUS304) for wet, washdown or corrosive areas
Quality Control
- Load capacity verified against the 250 kg working load rating
- Ball rotation checked by hand for free movement in all directions
- Material grade confirmed against the case and ball option ordered
Customization Options
- Case material selected between steel, galvanized steel, chrome-plated steel, and stainless steel
- Ball material fixed as steel for all models
- Other SI Series load ratings available where 250 kg is not the right size
Use Guide
- Divide the load by the number of units in contact to ensure each unit stays under 250 kg working load
- Keep peak and impact loading below the 300 kg maximum load figure
- Mount units on a flat deck plate so all balls sit at the same height
- Choose stainless steel case for wet or washdown environments
- Avoid use with uneven or soft-bottomed items such as cloth-wrapped loads
Specifications
| Model No | SI-30 |
|---|---|
| Mounting | Flange mount |
| Load Capacity | 250 kg |
| Max Load Capacity | 300 kg |
| Weight | 1.1 kg |
| Ball Diameter | 30.16 mm |
| Ball Material | Steel |
| Case Material | Steel, galvanized steel, chrome-plated steel, stainless steel |
| 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 main ball and support bearings
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 removal and replacement without damaging the deck, while press fit units are faster to install but harder to service |
|---|---|
| Lower rated SI Series units | The SI-30 suits 250 kg loads, so lighter applications are better served by a smaller unit that rolls with less effort |
| Plain conveyor rollers | Ball transfer units allow movement in any direction, while rollers only move product along one axis |
Flange Mount Ball Transfer Unit SI-30 Questions
What load can one SI-30 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-30 mounted?
It is a flange mount unit, so it is bolted through the flange onto the deck plate.
Which case material should I choose?
Steel for general use, galvanized steel for humid environments, chrome-plated steel for wear resistance, and stainless steel (SUS304) for wet or washdown areas.
Is a stainless steel version available?
Yes, the case can be supplied in stainless steel (SUS304).
How much does the unit weigh?
Each SI-30 weighs 1.1 kg, which is used for deck load and shipping calculations.
Can I get other load ratings in the same series?
Yes, the SI Series includes other load ratings, so ask for the model that matches your load per unit.
Get a Price for Flange Mount Ball Transfer Unit SI-30
Send the quantity and any material or surface option you need, and a quotation comes back against this model number.