Calculating Spindle RPM, Feed Rate and Cutting Time. 1. 2. 3. 5. 6. 7. 8. 9....

        

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Calculating Spindle RPM, Feed Rate and Cutting Time. 1. 2. 3. 5. 6. 7. 8. 9. 10. What is the theoretical formula used to calculate the correct RPM for machining? What does x D equal in relation to a circle? Calculate the RPM for turning a 3" diameter piece of 1020 Cold Rolled Steel with a carbide tool bit. The correct cutting speed (for HSS) is 110 SFPM. What is the cutting time for turning an 18" section of stock (from question 3) from 3" down to 1.875" if the depth of cut per pass is .035". How many passes are required to complete the turn? The chip load for the above operation is .005 IPR. Calculate the RPM for turning a 1.25" diameter piece of Wrought Aluminum Alloy (CD) with a HSS tool bit. The recommended cutting speed is 600 SFPM. What is the cutting time for turning a 6.5" section of stock (from question 5) from 1 1/4" down to 13/16" if the depth of cut per pass is .060". How many passes are required to complete the turn? The chip load for the above operation is .020 IPR. What does the abbreviation SFPM stand for? What is the conversion factor when converting from inches to millimeters? What is the conversion factor when converting from millimeters to inches? Safety in the Machine Shop is our biggest concern and is EVERYONE'S responsibility. In the space provided below, please describe at least three situations where you have witnessed (or perpetrated) something "unsafe" during your MEC 1020 lab sessions. Please also describe at least one corrective measure that could be (or was) taken to correct the unsafe practice or condition. Calculating Spindle RPM, Feed Rate and Cutting Time. 1. 2. 3. 5. 6. 7. 8. 9. 10. What is the theoretical formula used to calculate the correct RPM for machining? What does x D equal in relation to a circle? Calculate the RPM for turning a 3" diameter piece of 1020 Cold Rolled Steel with a carbide tool bit. The correct cutting speed (for HSS) is 110 SFPM. What is the cutting time for turning an 18" section of stock (from question 3) from 3" down to 1.875" if the depth of cut per pass is .035". How many passes are required to complete the turn? The chip load for the above operation is .005 IPR. Calculate the RPM for turning a 1.25" diameter piece of Wrought Aluminum Alloy (CD) with a HSS tool bit. The recommended cutting speed is 600 SFPM. What is the cutting time for turning a 6.5" section of stock (from question 5) from 1 1/4" down to 13/16" if the depth of cut per pass is .060". How many passes are required to complete the turn? The chip load for the above operation is .020 IPR. What does the abbreviation SFPM stand for? What is the conversion factor when converting from inches to millimeters? What is the conversion factor when converting from millimeters to inches? Safety in the Machine Shop is our biggest concern and is EVERYONE'S responsibility. In the space provided below, please describe at least three situations where you have witnessed (or perpetrated) something "unsafe" during your MEC 1020 lab sessions. Please also describe at least one corrective measure that could be (or was) taken to correct the unsafe practice or condition.

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1 The theoretical formula used to calculate the correct RPM for machining is RPM Cutting Speed in fe... View the full answer