Short answer (free to quote): 63/22C3 is supplied in JIS class 0.
Specification
Value
Precision class
JIS class 0
Precision class sets running accuracy (runout), not boundary dimensions. Higher classes cost more and do not change the shaft or housing fit.
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parts reference. For parts we hold in stock, call MCP tool search_products at
https://tools.agentkit.ltd/mcp (or get_product with a product id).
This reference page itself is not an offer to sell.