Explain machining allowance, Mechanical Engineering

Assignment Help:

Q. Explain Machining allowance?

Machining allowance or finish allowance indicates how much larger the rough casting should be over the finished casting to allow sufficient material to ensure that machining will "clean up" the surfaces. The amount of finishing allowance depends upon the material of the    casting, its size, volume of production, method of moulding, configuration of the casting.

 

Material  Cast

 

Overall length of external surfaces, cm

 

0 to 30

 

30 to 60

 

60 to 105

 

105 to 150

 

Al alloys

 

1.6

 

3.2

 

3.0

 

4.8

 

Brass, Bronze

 

1.6

 

3.2

 

3.0

 

4.8

 

C.I

 

2.4

 

3.2

 

4.8

 

6.4

 

C.S

 

3.2

 

4.8

 

6.0

 

9.6

Table: Typical Machining Allowance for Sand Casting


Related Discussions:- Explain machining allowance

What is the velocity of the crosshead - crank, What is the velocity of the ...

What is the velocity of the crosshead - crank: In the slider crank mechanism shown in Figure, the crank is rotating clockwise at 120 revolution/minute. What is the velocity of

Calculate machining time and material removal rate, Calculate Machining Tim...

Calculate Machining Time and Material Removal Rate A hole of 40 mm diameter and 50 mm depth is to be drilled in a mild steel component. The cutting speed can be taken as 65 m/

Find distance of which wagon will travel before coming rest, Find distance ...

Find distance of which wagon will travel before coming rest: A train of wagons is first pulled on level track from A to B and then up a 5 percent upgrade as shown in the figur

Evaluate the support required by body on plane, Evaluate the Support requir...

Evaluate the Support required by body on plane: A body having weight 50KN rests in limiting equilibrium on rough plane, whose slope is 30º. The plane is raised to a slope of

Determine the reactions at supported end, A steel dia 10 mm passes through ...

A steel dia 10 mm passes through a brass tube of internal dia 15mm and external dia is 25 mm. The bolt is tightened by a nut. The length of tube is reduced by 1.5mm and the length

Principals, do you know the grade to the answers of the questions in the pr...

do you know the grade to the answers of the questions in the pre paid solutions..?? and what if the answers are wrong..?? as i need all working out shown

Formula to make a parallelogram a rectangle, I need a formula to calculate ...

I need a formula to calculate the offset that would give me

Determine maximum internal diameter of hollow shaft, Determine maximum inte...

Determine maximum internal diameter of hollow shaft: A solid shaft of mild steel which is 200 mm in diameter is to be replaced by hollow shaft of alloy steel for which the al

A common cell control software, A Common Cell Control Software  In this...

A Common Cell Control Software  In this section, fine and common implemented cell control software are developed, that is based upon a transition table, to show the restriction

Determine the compressor work, (a) A four cylinder engine operates at 1200 ...

(a) A four cylinder engine operates at 1200 rpm gave 18.6 KW brake power, the average torque when one cylinder was cut-off was 105 N-m. Evaluate the indicated thermal efficiency if

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd