Rotary Files / Inside Ring Burs

Inside ring burs are used for primary finishing of ring castings. They are much faster and more precise than hand filing. Because of where they are generally used (on a motor instead of at the bench), gold recovery is significantly better. 

High Speed Inside Ring Burs

Shank Diameter

Head Diameter

Length of Cut

Cut

Stock#

Price

Shank Diameter

Head Diameter

Length of Cut

Cut

Stock#

Price

3⁄32"

½"

1"

Standard

33.629 Buy

$43.55

⅛"

½"

1"

Standard

33.635 Buy

$43.20

½"

1"

Fine

33.630 Buy

$68.75

½"

1"

Fine

33.636 Buy

$68.75

½"

1½"

Standard

33.631 Buy

$31.45

½"

1½"

Standard

33.637 Buy

$31.45

½"

1½"

Fine

33.632 Buy

$75.95

½"

1½"

Fine

33.638 Buy

$77.45

 

Carbide Inside Ring Burs

Head Diameter

Length of Cut

Cut

Shank Diameter

Stock#

Price

Head Diameter

Length of Cut

Cut

Shank Diameter

Stock#

Price

½"

1"

X-Fine

¼"

20.290 Buy

$32.70

½"

½"

Fine

3⁄32"

20.01401 Buy

$17.10

½"

1"

Fine

¼"

20.291 Buy

$35.60

½"

½"

X-Fine

3⁄32"

20.01402 Buy

$17.10

⅜"

½"

Fine

⅛"

20.292 Buy

$20.00

½"

½"

X-Coarse

3⁄32"

20.01403 Buy

$17.10

½"

⅝"

Fine

⅛"

20.293 Buy

$17.70

⅜"

½"

Fine

⅛"

20.01404 Buy

$29.60

⅜"

½"

X- Fine

⅛"

20.01405 Buy

$29.60

⅜"

½"

X-Coarse

1⁄8"

20.01406 Buy

$29.60