How to find the right Bronze Tubes AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Bronze Tubes
- Cored bar vs drawn tube
- Cored bar is continuous-cast hollow bar with an undersize ID and oversize OD, made for machining into bushings. Seamless drawn tube is near-nominal, thin-wall and used as-is. Bushing makers need machining stock, while fluid and structural uses need finished tube.
- Alloy
- C93200 for general bushings. C95400 for high-load bushings. SAE 841 sintered bronze tube for self-lubricating sleeves. Phosphor bronze for small drawn tube. Load capacity, lubrication needs and corrosion behavior differ between these grades.
- Finished size after machining
- Confirm that the cored bar's ID is small enough and its OD large enough to clean up to your final bushing dimensions. Cast stock needs material removed on both surfaces to reach a sound, true finish.
- Bore handling for sintered tube
- Press-fit oil-impregnated bronze sleeves and size the bore by reaming or burnishing, not heavy cutting. Aggressive machining closes the pores that hold the lubricating oil.
Brands that matter
- Concast: Cored and solid continuous-cast bronze bar for bushings.
- National Bronze & Metals: Bearing bronze cored bar in common bushing sizes.
- Bunting Bearings: Cast bronze and powdered-metal bronze tube stock.
- Oilite: Sintered oil-impregnated bronze tube and sleeve stock.
What to avoid
- Expecting cored bar to be usable without machining.
- Leaded bronze tube in potable water lines.
- Thin-wall tube of unknown alloy for pressure service.
Questions
Why is the bronze tube larger outside and smaller inside than listed?
Cast cored bar is supplied with a machining allowance so it can be turned and bored to clean, accurate final dimensions.