Enter values below to calculate the diameter of a bolt circle.
Tip:
To measure the center distance between two holes of equal
diameter with an electronic caliper.
1. Use the inside jaws to measure the diameter of one of the holes. Before you
remove the caliper from the hole, press the button to zero the caliper while
it is set to the diameter of the hole.
2. Still using the inside jaws, measure the distance between the far surfaces of
the two holes. The caliper reading is the distance between centers of the
two holes.
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- 3/8" shank fits collets and end mill holders
- 3.375" overall length
- Uses common SR44 batteries (included)
- Accuracy to 0.001"
- Includes polarizing attachment to adjust dot size
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- Made from aluminum plate 3/4" thick
- Plate is 6" x 12"
- 220 Holes tapped 1/4"-20, 72 holes for locating pins
- Includes clamping kit
- Designed for small work pieces
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- Makes tool changes easier, faster, and safer
- When engaged, the plunger automatically drops into the locking hole as the spindle is rotated
- An electro-magnetic interlock disables power to the motor when the spring plunger is engaged
- Frees both hands for changing tools
- Loosen and tighten keyless chucks with one hand
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