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Undersized/Oversized High-Speed Steel Reamer Set, 14 Pieces

Manufacturer part: 3087A23

Keep a variety of reamer sizes on hand for finishing holes.Round Shank—These reamers fit in the chuck of drill presses, turret lathes, and other machine and power tools, making them the most common shank type.Spiral Flute—Since these reamers clear chips better than straight flutes, they leave holes with a smoother finish. They're better for holes with breaks in the surface, such as a keyway, because they cut continuously across the breaks instead of moving in and out.Oversized Fractional—Oversized reamers are larger than the fraction by 0.001" in diameter to create a looser fit than standard sizes. They're typically used in holes where objects such as pins need to stay in place, but still can be easily removed.Undersized Fractional—Undersized reamers are smaller than the fraction by 0.001" in diameter to create a tighter fit than standard sizes. They're typically used to press-fit a pin, bearing, or other object into a hole.High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.Right-Hand Spiral—These reamers pull chips upward as they cut, so they're often used in blind holes.

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