Term
| What do all inserts and holders have in common? |
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Definition
-A tool holder
-An Insert
-A Clamping system |
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Term
| What does a large side cutting edge angle do? |
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Definition
| (Also called lead angle ranging from 0-45 degrees) makes a thinner chip. No shoulder can be cut with large angles. |
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Term
| What is the general rule for overhang of a tool? |
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Definition
| Does not exceed 1.5 times the thickness of shank of tool |
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Term
| Types of threading inserts? |
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Definition
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Term
| Overhang ratio for steel boring bars? What about tungsten carbide bars? |
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Definition
4:1 for Steel
10:1 for Tungsten carbide
(Both are approximate) |
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Term
| How much more does a 2" bar deflect than a 4" |
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Definition
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Term
| What is on an insert to improve finish? |
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Definition
| A flat or radius called a wiper flat(feed + .03) always on square inserts sometimes on others. |
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Term
| What 3 angles determine orientation of insert in facemills? |
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Definition
Axial Rake
Radial Rake
Lead Angle(Cutting edge angle) |
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Term
| What is the axial rake angle? |
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Definition
| The angle between the face of the insert and axis of cutter |
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Term
| What is Lead angle(Cutting edge angle) |
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Definition
| Angle between side of insert and axis of spindle |
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Term
| What does the pitch of a facemill refer to? |
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Definition
| # of inserts for a given diameter. |
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Term
| What does a positive rake angle do for facemills? What about negative rakes? |
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Definition
Positive= Easier Cutting Action
Negative= Heavier cuts and interrupted cuts |
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Term
| What should you do to brazed on carbides? |
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Definition
| Hone a .002"-.004" Chamfer at 45 degrees |
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Term
| What type of toolholder should you use for a brazed on carbide in a lathe? |
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Definition
| Straight or parallel toolholder |
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