The SP-76 is a super heavy-duty ball transfer unit, not a traditional radial bearing. It features a main 76mm (3-inch) steel or nylon ball housed in a heavy metal casing, allowing 360-degree movement for loads up to 2,000–2,500 kg. Model SP-76 Brand ZH Material Chrome Steel precision P0 P6 P5 P4 Product Description The SP-76 typically refers to an industrial-grade, ultra-heavy-duty ball transfer unit—often known as a "ball caster" or "transfer ball bearing." It is widely used
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