Milling

what is the only reason you should use the emergency stop button on a milling machine

• in an emergency

• when you go for you breaks

• to stop a cut that has gone too far

• to practice you throwing aim

which of the below items of PPE should be worn during a milling operation (Multiple answers)

• safety glasses/goggles

• safety boots/shoes

• safety gloves

• overalls / shop coat with close fitting sleeves

which of the below will you find in an engineering drawing (multiple answers)

• Drawing Number

• Scale

• Projection

• Tolerance

• Dimensions

what type of milling is this

• up cut milling

• conventional milling

• climb milling

• drive milling

what type of milling is this

• down cut milling

• conventional milling

• climb milling

• flour milling

which of the below factors effect the cutting speeds and feeds when carrying out milling operations. (multiple answers)

• type of material being cut

• power output of the milling machine

• type of cutter being used

• type of holding methodology

• type of eye protection used

which of the below are milling work-holding devices? (Multiple answers)

• fixtures

• rotary table

• dividing head

• 4 jaw chuck

• angle plate

which statement below is the correct way of leaving the milling machine after an operation

• Leave everything where it is as it may be useful for the next job.

• Clean all tooling, measuring equipment, and work holding devices then return them to their designated stores. Remove swarf from the bed of the machine and the surrounding area and dispose into the appropriate bin.

• Clean all tooling, measuring equipment, and work holding devices then return them to their designated stores. Immediately start the set-up of the next job without cleaning the mill.

• Take everything back to the store the way it is as it is the store persons job to ensure its clean and safe to use.

to work out the appropriate feeds and speeds for the milling machine, the correct formula is

•  $RPM=\frac{\left(cutting\ speed\times1000\right)}{\pi\times\phi}$  

•   $RPM=\frac{\left(cutting\ speed\ \times50\right)}{\pi\times2d}$  

•  $RPM\ =a^2+\frac{b^2}{c^2}$  

•  $RPM=\ -b\pm\frac{\sqrt{b^2-4ac}}{2a}$  

this type of fit is

• skin tight

• transition

• interference

• clearance