Term
| What are some advantages to worm gearing? |
|
Definition
| High gear ratios possible in small spaces and self locking |
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|
Term
| What is a worm wheel profile based on? |
|
Definition
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|
Term
| Three common profiles of a worm gear? |
|
Definition
Fine pitch worm gearing
coarse pitch worm gearing
brown and sharpe worm gearing |
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Term
| What is fine pitch worm gearing used for? |
|
Definition
| Used to transmit motion rather than power |
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Term
| Multi start worms have larger lead angles which equal? |
|
Definition
| More efficient transmission of power |
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Term
| What is coarse pitch worm gearing used for? |
|
Definition
| For transmitting power, sometimes with a reduction in speed |
|
|
Term
| What is the pressure angle of a coarse pitch worm? |
|
Definition
| 20 Degrees Generally and sometimes 25 Degrees |
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|
Term
| What is the pressure angle of a brown and sharpe worm gear? |
|
Definition
| 14.5 Degrees (29 degree included angle) |
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Term
| True or false is a Brown and Sharpe worm gear deeper than an acme? |
|
Definition
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Term
| Type of contact between a worm and worm gear? |
|
Definition
Plain
Single Enveloping
Double Enveloping |
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|
Term
| What the weakest type of contact/ drive? |
|
Definition
|
|
Term
| Whats the most common type of contact? |
|
Definition
|
|
Term
| What type of contact provide area contact? |
|
Definition
|
|
Term
| Throated worms must be cut by? |
|
Definition
|
|
Term
| What a worm and worm gears made out of? |
|
Definition
Worm= Hardened and Ground Steel
Worm Gear= Phosphor Bronze |
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Term
| Number of teeth on spindle gear must by divisible by? (Threading) |
|
Definition
|
|
Term
| What are the easiest multi-starts to cut? |
|
Definition
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|
Term
| Where do you engage at on the thread dial for Odd number of threads? |
|
Definition
| For first start engage on any whole number for 2nd start engage at any half graduations. |
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|
Term
| What are the 3 types used for thread grinding? |
|
Definition
| Resinoid, vitrified, and diamond. |
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|
Term
| What wheel is used for extreme accuracy when thread grinding? |
|
Definition
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|
Term
| The blank for thread rolling is generally how much bigger than PD? |
|
Definition
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|
Term
| Thread strength is increased by how much when rolling? |
|
Definition
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|
Term
| What is the accuracy of the lead held to when thread grinding? |
|
Definition
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