Bronze cored bar is hollow bronze stock used to machine sleeve bushings, bearing rings, spacers, and parts with a through-bore. It reduces scrap and machining time compared with starting from solid bar and drilling out the center.
For cast bronze bearing work, C93200 / SAE 660 cored bar is one of the most common stock choices. High-strength and special-service parts may use C95400, C86300, C95500, or marine bronze alloys.
| Quick spec | Catalog reference |
|---|---|
| Stock type | Hollow / cored bronze bar |
| Common bearing alloy | C93200 / SAE 660 |
| Manufacturing route | Continuous cast cored bar |
| Typical standard | ASTM B505 for continuous cast stock |
| Size format | OD x ID x Length |
Manufacturing & Performance
Continuous cast cored bar is produced with a controlled bore and dense bronze structure, giving machinists a stable starting point for ID finishing, OD turning, grooves, chamfers, and flange features.
The biggest advantage is efficiency. When the finished part is a sleeve or ring, cored bar removes less material, shortens cycle time, and lowers the amount of bronze converted to chips.
Standard Stock & Machining Notes
| Feature | Buying note | Why it matters |
|---|---|---|
| OD | Choose enough cleanup allowance | OD must finish to housing fit |
| ID | Choose enough cleanup allowance | ID must finish to shaft clearance |
| Length | Saw-cut blank or full length | Include facing allowance for machined parts |
| Alloy | Match load, speed, and lubrication | C93200 is standard, not universal |
Size & Availability
Specify cored bar as OD x ID x length. Inch and metric requirements can be quoted as raw stock, cut blanks, or finished machined bushings. If the finished part has a very small bore or heavy solid features, Bronze Solid Bar may be the better starting form.
Alternative Alloys
- C93200 SAE 660 Bearing Bronze for standard cored bearing bar.
- C95400 Aluminum Bronze for higher-strength bushings.
- C86300 Manganese Bronze for heavy low-speed bearing applications.
- C95800 Marine Bronze for marine or corrosion-resistant hollow parts.
Typical Applications
- Sleeve bushings, flanged bearings, bearing rings, and spacers.
- Pump bushings, gearbox sleeves, pivot bearings, and rebuild parts.
- Custom CNC bronze components with a through-bore.
RFQ Details That Speed Up Quoting
Send alloy, OD, ID, length, quantity, raw stock or finished part requirement, finished bore tolerance, and any certification needs.