BUHA Ball Transfer Unit | 304 Stainless Steel Press-Fit Omnidirectional Unit | JDF
The BUHA Series Ball Transfer Unit is a press-fit omnidirectional load-bearing unit with a 15.87mm main ball, designed for smooth 360° movement of loads on conveyor tables, assembly lines, and material handling workstations. The 304 stainless steel body and SUS440C ball provide reliable performance in demanding industrial environments.
How to select the right BUHA unit:
Determine the weight of the heaviest item to be moved.
Estimate the minimum number of units that will bear the load at any moment (typically 3-4 for flat loads).
Divide the total load by the minimum supporting units to get the nominal load per unit.
Apply a safety factor: divide the rated capacity by 2 for steady handling, or by 3 for shock/impact or continuous duty.
Select the model whose rated capacity exceeds the required per-unit load after applying the safety factor.
Example: For a 200 kg load supported by 4 units, the nominal load per unit is 50 kg. With a safety factor of 2, the required rated capacity is 100 kg (approx. 980 N). BUHA200 is suitable.
technical specification
| Model | Number of Rollers | Ball Diameter (mm) | Allowable Load per Unit (N / kgf) | Body Material | Main Ball Material |
|---|---|---|---|---|---|
| BUHA200 | 4 | 15.87 | 343 / 35 | 304 Stainless Steel | SUS440C |
| BUHA400 | 8 | 15.87 | 343 / 35 | 304 Stainless Steel | SUS440C |
| BUHA600 | 12 | 15.87 | 343 / 35 | 304 Stainless Steel | SUS440C |
FAQ
Q: What is the difference between BUHA200, BUHA400, and BUHA600?
A: The three models differ in the number of integrated ball rollers. BUHA200 has 4 rollers, BUHA400 has 8, and BUHA600 has 12. In practice, the total load capacity of the assembly increases with the number of rollers.
Q: Can BUHA units be used in wet or corrosive environments?
A: Yes. The 304 stainless steel body and SUS440C main ball provide good corrosion resistance, making BUHA units suitable for food processing, pharmaceutical, and outdoor applications.
Q: How do I install a BUHA unit?
A: BUHA units are press-fit type. Press the unit into a precision-drilled hole with an interference fit. The housing is fractionally larger than the hole to hold the unit securely. For maintenance or replacement, the unit can be pressed out.
Q: What is the maximum operating temperature?
A: The BUHA series can operate within a temperature range of -30°C to +100°C (based on comparable stainless steel ball transfer units).
