A common cause of flange leaks is a damaged or corroded flange. Resolving this requires a flange facing machine to resurface the face back to near it's original condition. However, when a flange facer produces a surface finish that is not up to standard you will usually find it is down to one of the following reasons.
1. Machine is out of balance
If the machine is operating in any angular position other than horizontal then it will have to be balanced. An incorrectly balanced flange facing machine can cause the machine rotation to be slow which results in a poor surface finish. Check the machine balance to resolve the issue.
2. Machine base is incorrectly installed
The machine base gives the flange facer it's stability so an incorrect setup will result in a bad finish. Check the machine installation guidance and ensure that the mounting bolts are tightened, the adjustable jaw has been adjusted correctly and the flange alignment is accurate.
3. Machine installation bolts have not been tightened
Loose installation bolts will result in instability. Check that they are all tightened before starting your resurfacing procedure.
4. Turning tool not ground correctly or worn down
In instances where the machine turning tool is not ground correctly or has worn down, the operator will be required to replace as necessary.
5. Depth of the cut is too deep
Where the cut is too deep the operator is required to manually adjust the depth of the cut setting. To achieve this on the Mirage M1000i the operator can place a magnetic clock on the tool post, zero the dial on the flange face and then add depth of cut. Other machine models may vary.
6. Too much play in the tool post gib strip or carriage
A simple adjustment to the tool post settings and carriage should resolve this issue.
7. Too much play in the main hub bearings
Adjustment the main hub bearings. These are located beneath the top cap on the M1000i. Replacement bearings may be required in extreme circumstances.
8. Worn drive motor
There is no quick fix for a worn drive motor, so a replacement must be fitted. Attempting to carry on with the worn motor will result is bad flange surface finishes and could potentially further damage the flange facer.
9. Poorly adjusted surfacing arm
The surfacing arm locking bolts may be loose. Make sure these have been tightened before continuing the operation.
10. General poor machine condition
Poorly maintened equipment can result is poor performance. In circumstances where the machine is damaged or faulty, contact the machine manufacturer and arrange a service or refurbishment. Mirage Machines offer refurbishment and servicing of all make and models of portable machine tools. Contact us for more details.
Guidance in this blog post is based on the Mirage MM1000i internal flange facer.