Goods
Inwards Inspection Inwards dimensional inspection to
check for distortion and measure bore profile and sizes.
Removal
of Old Whitemetal Existing material is either machined
or melted away from the backing material
Grit
Blasting Bearing Shell Material Preparation
for tin bonding to the backing material using a chilled iron
grit
Submerged
Tinning of Shell Material Entire bearing is submerged in a 7000kgs
tin bath to ensure complete coverage at uniform temperatures.
A double tinning process is used.
Centrifugal
Casting of New Whitemetal Lining The
new lining material is centrifugally cast into the bearing
shell delivered from a temperature controlled holding pot
mounted directly onto the casting machine. Cooling starts
as soon as possible with an array of water cooling jets.
Ultrasonic
testing of Bond Integrity After proof machining the bond intergity
is inspected by Ultrasonic Inspection. As standard this
is to ISO 4386-1 Class 3, but customer specific specifications
and processes can be used. A full report is provided in
the quality documentation pack with the bearing.
Pressure
Testing (if required) If
required high pressure oil feed galleries can be pressure
tested in the shell to check for cracks.
Final
Machining Bearing shells
are re-sized and machined to final sizes required.
Dye
Pentrant Inspection To check the quality of the lining
material a dye penetrant inspection is carried out by qualified
inspectors.
A full report with photographic evidence is included in the
quality documentation pack with the bearing.
Final
Dimensional Inspection As
a final check a full dimensional inspection is carried out
and a report is provided in the quality documentation pack
with the bearing.
Preservation
and Packaging Bearings are
presevered and packed for shipping, if long term storage is
required, sealed foil bags with dessicant are provided.
