Burks 629 Ball Bearing 6203
The Burks 629 is a replacement 6203 ball bearing for Burks pump service. It is the part that locates the shaft and absorbs the hydraulic side loads the impeller generates, and it is the one component whose early failure tends to take other parts with it.
Fatigue is the natural end of a bearing life, and it shows as spalling on the races. Far more common in pump service is premature failure from water getting past a leaking shaft seal and washing the grease out, or from vibration caused by a worn or unbalanced impeller. Fit the bearing, but find the cause.
Size 6203 is a standard metric designation, which makes the dimensions easy to confirm against the old part. What is not interchangeable is the internal clearance, the seal or shield arrangement and the cage material, so check those against what you are removing rather than assuming any bearing of the same number will do.
Key Features
- Genuine Burks replacement ball bearing
- Size 6203 deep groove design
- Carries radial load with useful axial capacity
- Keeps the shaft running true for the seal and impeller
- Direct replacement for the original Burks part
- Standard designation makes verification straightforward
Applications
- Burks pump and motor bearing replacement
- Curing a rumble or growl that rises with speed
- Repair after water ingress past a failed shaft seal
- Restoring shaft alignment to protect a new mechanical seal
- Planned overhaul of a pump with high running hours
- Industrial, marine and dockside installations
Specifications
- Brand: Burks
- Manufacturer: Crane Pumps and Systems
- Manufacturer Part Number: 629
- Part Type: Ball bearing
- Size: 6203
- Condition: New
Frequently Asked Questions
Q: Does it need repacking with grease?
Sealed and shielded bearings come charged from the factory and should be left alone. Open bearings in a grease-lubricated housing are filled according to the Burks instructions - overfilling causes churning and heat, which is as damaging as running short.
Q: Should both bearings be changed together?
On a pump with two, yes. They have done the same hours in the same conditions, and the labour to reach the second one has already been spent.
Q: How do I know a bearing is on its way out?
Turn the shaft slowly by hand with the coupling disconnected and feel for notchiness, then listen while it runs. A growl that follows speed, a hot housing, or visible grease thrown out around the seal are all reasons to change it.
Q: What should I check before fitting the new one?
The shaft journal and the housing bore. If either is worn or scored, the new bearing will spin in place and fail quickly. Also find out where any contamination came from, because water past a shaft seal will kill the replacement just as fast.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct ball bearing before you order.
CLRMarine
