0
Yes, the pitch circle is an imaginary circle on the gear that passes through the gear teeth and the addendums.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
How do you calculate face width per gear?
Its is taken standard as 2*pitch circle diameter - 3**pitch circle diameter for cast teeth. 3 *pitch circle diameter - 4 *pitch circle diameter for cut teeth. Pitch circle diameter = PI*module regards, Pranav
How do you find the base circle diameter when drawing a gear?
This is simply the pitch circle diameter multiplied by cosine of pressure angle, which is most commonly 20 degrees.
How can you find the pitch circle diameter overall diameter and diametrical pitch of two gears working together?
I will start with the Formula for DP(diametral pitch) and PCD (pitch circle diam in Inches) Formula :- PCD = N/ DP (N is number of teeth) I will also assume that the gears are straight tooth gears (Spur Gears) First assume that the pitch circle is at a point half way between the crest and the root of the teeth (this is not true,but it is where we start to find what we want) Count the number of teeth in each gear. Suppose the result is 28 & 70 teeth. Now measure the exact distance between the very centre of the 2 gears, which is called the Centre Distance. Suppose the result is 3.5 inch. The individual PCD's will be in the ratio 28:70 which is the same as 2:5 The radii will of course also be in the ratio 2:5. Now 2 plus 5 equals 7, so this means that the 2 radii will be; 2/7 of 3.5 for the small gear, and 5/7 of 3.5 for the large gear. Result of these calculations is : Small Radii is exactly 1inch. Large radii is 2.5 inch. These 2 radii must total the distance between the centers of the 2gears, otherwise you have made an error. Now, the 2 PCD's will each be double the radii you calculated, so they will be , 2 inch and 5 inch. Now you can use these PCD's to calculate the Diametral Pitch of the gears. Use the formula I have given you up top. PCD = N/DP which is the same as DP = N / PCD so 28/ 2= 14. So DP is 14. Check using the large gear details, 70/5= 14 which is the same result so we know we are correct. Finally, the Addendum (distance between the Pich Circle and the Outer Diameter) Addendum = 1/DP = 1/14 = 0.071 Inch. The outer diameter of the gear will be it's Pitch Circle Diam PLUS 2 addendums = 2+ 0.142 = 2.142 Overall Diam for small gear and 5+ 0.142= 5.142 Inch Outer Diam for the larger gear. ALSO, there other types of Gear Pitch which are used. There is Circular Pitch and there is Module Pitch. Be sure that your gear does in fact have teeth which are Diametral Pitch, otherwise all these calculations will give the incorrect result. any factory which cuts gears will be able to check if your gears are DP or not. It is a job for specialists.
How do you find the base circle diameter of helical gear?
Measure the outside diameter and subtract tooth height times two.
What does the gear shape button look like?
a gear
How do you calculate face width per gear?
Its is taken standard as 2*pitch circle diameter - 3**pitch circle diameter for cast teeth. 3 *pitch circle diameter - 4 *pitch circle diameter for cut teeth. Pitch circle diameter = PI*module regards, Pranav
How do you find the base circle diameter when drawing a gear?
This is simply the pitch circle diameter multiplied by cosine of pressure angle, which is most commonly 20 degrees.
What are reason of circular pitch error in gear?
improper machining or interference where in the root of the meshing gear comes in contact with the tip of the other gear during operation....to avoid this the tangents to the base circle of both gears should not coincide..
Formula module in helical gear?
the module of a helical gear is calculated in the same way of that of a spur gear: module=pitch diameter / no of teeth the module of a helical gear is calculated in the same way of that of a spur gear: module=pitch diameter / no of teeth
What does the d with a circle around it on a gear shift?
Overdrive
What is the correction factor in gear?
Co efficient increasing/degreasing the contact circle is the correction factor in gear.
Which gear do you drive normally in a D with a circle around it D 1or 2?
Driving under normal conditions use "Drive" with circle (highest gear) best fuel economy
What is the formula in getting the diametral pitch of helical gears?
External diameter / number of gear = pitch
What is interference in gears?
Interference in gears is mating of two non-conjugate or non-involute tooth profiles. Basically when the tip of pitch circle of pinion O1 tries to dig out (interfere with) the tooth of the gear wheel O2 .
What is the d with the circle for on a Mercury Sable gear shift?
it is to select "overdrive" gear in transmission. mainly for highway driving. if you have both "D" and "D" with circle around it, use "D" for most driving needs.
How can you find the pitch circle diameter overall diameter and diametrical pitch of two gears working together?
I will start with the Formula for DP(diametral pitch) and PCD (pitch circle diam in Inches) Formula :- PCD = N/ DP (N is number of teeth) I will also assume that the gears are straight tooth gears (Spur Gears) First assume that the pitch circle is at a point half way between the crest and the root of the teeth (this is not true,but it is where we start to find what we want) Count the number of teeth in each gear. Suppose the result is 28 & 70 teeth. Now measure the exact distance between the very centre of the 2 gears, which is called the Centre Distance. Suppose the result is 3.5 inch. The individual PCD's will be in the ratio 28:70 which is the same as 2:5 The radii will of course also be in the ratio 2:5. Now 2 plus 5 equals 7, so this means that the 2 radii will be; 2/7 of 3.5 for the small gear, and 5/7 of 3.5 for the large gear. Result of these calculations is : Small Radii is exactly 1inch. Large radii is 2.5 inch. These 2 radii must total the distance between the centers of the 2gears, otherwise you have made an error. Now, the 2 PCD's will each be double the radii you calculated, so they will be , 2 inch and 5 inch. Now you can use these PCD's to calculate the Diametral Pitch of the gears. Use the formula I have given you up top. PCD = N/DP which is the same as DP = N / PCD so 28/ 2= 14. So DP is 14. Check using the large gear details, 70/5= 14 which is the same result so we know we are correct. Finally, the Addendum (distance between the Pich Circle and the Outer Diameter) Addendum = 1/DP = 1/14 = 0.071 Inch. The outer diameter of the gear will be it's Pitch Circle Diam PLUS 2 addendums = 2+ 0.142 = 2.142 Overall Diam for small gear and 5+ 0.142= 5.142 Inch Outer Diam for the larger gear. ALSO, there other types of Gear Pitch which are used. There is Circular Pitch and there is Module Pitch. Be sure that your gear does in fact have teeth which are Diametral Pitch, otherwise all these calculations will give the incorrect result. any factory which cuts gears will be able to check if your gears are DP or not. It is a job for specialists.
When traction on the road is poor drive in a lower gear true or false?
true
