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Machinist Period 3: Machine Tools (70%)

Terms in this set (20)

A grinding wheel has the following designation on it:
51 C 46 N 6 S 23
Based on the above designation what does the "C" stand for?
Abrasive type (Silicon Carbide).
Which type of broaching machine would be the best to use when performing a very long broach?
A horizontal broaching machine.
If the speed of rotation of the work head on a cylindrical grinder is set too slow what will happen?
The workpiece will show burn marks.
Where are clearances for connecting splines found?
The clearance is between the top and bottom of the mating teeth on a side fit spline.
Which of the following applications will commonly make use of a worm gear drive system?
An elevator system.
What is an advantage of using the involute spline versus the straight-sided spline?
the involute spline is self-centering.
When an odd number of gears mesh, the last gear will be turning in the _____ direction as compared to the first gear
same
Which of the following materials would require the highest cutting speeds when performing a broaching operation?
Aluminum
A diamond wheel has the following designation:
CB 80 R - 100 V 56 1/4
Based on the above designation what type of abrasive is used in this wheel?
Cubic boron nitride.
Which of the following is the most common way to cut a spur gear
Hobbing
Which of the following procedures is only suitable for producing low speed, low power gears?
Casting
A worm and worm wheel are used together on a certain application. Which of the following statements is true when talking about the type of material used for each?
Harder material is generally used for the worm.
Which of the following numbers can NOT be factored into any of the holes commonly used with a universal dividing head?
71 (divide all answers by 4, whichever has more than 1 decimal spot is the answer)
Which of the following gear types have the smoothest and quietest operation?
Hypoid
On an indexing machine when the index plate must rotate in the same direction as the crank you have:
Positive Rotation
Which type of worm gearing would be used on a winch to raise and lower a heavy load like an elevator?
The Coarse-Pitch industrial worm gearing.
Which of the following broaching machines pushes the broach through the workpiece?
A broaching press.
Which of the following grinders would be the best to use when grinding large plates flat and parallel?
The vertical spindle with rotary table grinder.
With gear terminology, which of the following best describes a "face"?
The part of the tooth that mates with the other tooth and lies above the pitch circle.
Which of the following processes will produce a gear that can ONLY be used for light applications?
Extruding
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