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Specification
Brand : USA Knifemaker Supply
BulletPoint1 : Major Diameter (cut): .314/.315”
BulletPoint2 : Minor Diameter (pilot): .250”D x .150"L
BulletPoint3 : Material: Carbide
BulletPoint4 : Type: One piece - non-removable pilot
BulletPoint5 : Fits LARGE Corby bolts that are .313" Shoulder Diameter with .246" shaft Diameter
Color : Silver
ExternallyAssignedProductIdentifier1 : 653341401021
ExternallyAssignedProductIdentifier2 : 0653341401021
GpsrSafetyAttestation : 1
ItemName : Carbide Counterbore for Our Large Corby .314" Cutting with .250" Pilot
ItemPackageDimensions_Height : 0.2 inches
ItemPackageDimensions_Length : 5.51 inches
ItemPackageDimensions_Width : 3.94 inches
ItemPackageQuantity : 1
ItemShape : Ball
ItemTypeKeyword : cutting-burs
Manufacturer : USA Knifemaker
Material : Carbide
MeasurementSystem : Imperial
ModelName : SC-7
ModelNumber : SC-7
NumberOfFlutes : 2
NumberOfItems : 1
PartNumber : DTSB-CCT-CB-146036
ProductDescription : The major diameter is slightly oversize to compensate for the material being relieved to shrink back. When drilling G10 or Micarta (or other fabric phenolic) the material shrinks back slightly. In other words if you drill a .125” diameter hole in canvas micarta, it is going to finish around .123” in actual diameter. We had these counterbores sized to take into account the hole shrinking in size. These are carbide so they should last a very long time if you are drilling wood, g10 or phenolic. They will also relieve metal like stainless or titanium but expect them to wear faster. Like all drills, consider these a consumable. Eventually, they will wear enough they have to be replaced. Since they are carbide, they will snap if subjected to side loads where a regular drill bit could handle it. Secure your work piece and keep your drilling straight up and down. If you snap one of these, you own both pieces. To use these: Locate and drill the minor diameter (pilot) holes in your handle material. Insert the counterbore and align the holes and secure your work piece or hold on tight so you don’t bend and break the carbide counterbore. Drill just deep enough for the major diameter to hold the scale in place after your grind the excess corby bolt head away. I eyeball this but you can also set up a gauge and countersink to your exact depth. If you are doing several, use the drill stop on your drill press (finally a use for that!) to set the depth of the counterbore and drill all of them at once. The drill stops occasionally move so check your work frequently in case it slips and goes too deep. NOTE: We have several sizes of counterbores pictured for clarity of illustration. You are ordering one counterbore of the size shown above.
ProductSiteLaunchDate : 2018-10-25T07:00:00.000Z
Size : Conial 8mm
SupplierDeclaredDgHzRegulation : not_applicable
SurfaceRecommendation1 : Wood
SurfaceRecommendation10 : Masonry
SurfaceRecommendation11 : Concrete
SurfaceRecommendation12 : Stone
SurfaceRecommendation13 : Cast Iron
SurfaceRecommendation14 : Iron
SurfaceRecommendation15 : Brass
SurfaceRecommendation16 : Ceramic
SurfaceRecommendation17 : Engineered Wood
SurfaceRecommendation18 : Polyvinyl Chloride
SurfaceRecommendation19 : Acrylonitrile Butadiene Styrene
SurfaceRecommendation2 : Metal
SurfaceRecommendation20 : Nylon
SurfaceRecommendation21 : Porcelain
SurfaceRecommendation22 : Glass
SurfaceRecommendation23 : Pine
SurfaceRecommendation3 : Plastic
SurfaceRecommendation4 : Stainless Steel
SurfaceRecommendation5 : Wood
SurfaceRecommendation6 : Copper
SurfaceRecommendation7 : Alloy Steel
SurfaceRecommendation8 : Brick
SurfaceRecommendation9 : Tile
UnitCount : 4
UnspscCode : 23251706