Burks 21463 Ball Bearing 6304 Open
This is the size 6304 open ball bearing Burks lists as part 21463. It is a deep groove bearing, the type used throughout pump and motor construction because it takes radial load with a useful amount of axial load at the same time.
Bearings announce themselves before they fail. A rumble or a growl that rises with speed, heat at the housing, or roughness felt when the shaft is turned by hand all point the same way. What is worth asking is why - most bearings that fail early were killed by contamination past a failed seal, by a hydraulic imbalance from a damaged impeller, or by misalignment, and the replacement will go the same way unless that is dealt with.
Fit it with the right method. Press only on the ring that is being fitted tight, never through the balls, and use heat rather than hammering for an interference fit. A bearing that has been driven home through the rolling elements is already damaged before the pump has turned once.
Key Features
- Genuine Burks replacement ball bearing
- Size 6304 open 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: 21463
- Part Type: Ball bearing
- Size: 6304 open
- Condition: New
Frequently Asked Questions
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.
Q: Can I use a bearing with a different suffix?
Not without checking. Suffixes cover internal clearance, shields, seals and cage type, and those differences matter in pump service where heat and load are not what a general purpose application would see.
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
