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51.

What Are The Advantages And Disadvantages Of V Belt?

Answer»
  • The main ADVANTAGES of V belt are it has more gripping power, LONG life and it OCCUPIES less space.
  • Disadvantages are it is not fit for long distances and cross belt drive.
Discussion
52.

What Are The Rules For Belt Drives?

Answer»
  • The DISTANCE between two pulleys should not be less than three times the diameter of the larger pulley. 
  • The slack SIDE should be UPPERMOST which may increase the arc of contact.
  • The ratio of diameter of both the pulleys should not exceed 6:1. 
  • If necessary ,a jockey pulley should be used to MINIMIZE the slip.
Discussion
53.

Write Short Notes On Creep And Slip In Belt Drive?

Answer»
  • The movement of belt upon the FACE of rim or outer surface of DRIVER and driven PULLEYS within the AREA of arc of contact is called creep in belt drive.
  • If the belt is loosely FITTED on pulleys, it slips down which is called slip in belt drive.
Discussion
54.

What Is Dressing In Belt Drive?

Answer»

To avoid slip or creep, the resin POWDER or PASTE is poured in between the OUTER SURFACE of pulley and belt for increasing the tension is called dressing.

To avoid slip or creep, the resin powder or paste is poured in between the outer surface of pulley and belt for increasing the tension is called dressing.
Discussion
55.

Define Crowning In Belt Drive?

Answer»

The OUTER surface or FACE of rim of the PULLEY is MADE in convex form to keep the belt in center when it is in movement, it is called CROWNING.

The outer surface or face of rim of the pulley is made in convex form to keep the belt in center when it is in movement, it is called crowning.
Discussion
56.

What Are The Uses Of Jockey Pulley?

Answer»

Jockey pulley is used to INCREASE the CONTACTING area in between the belt and pulley and also used to press the belt for GIVING TENSION.

Jockey pulley is used to increase the contacting area in between the belt and pulley and also used to press the belt for giving tension.
Discussion
57.

What Are The Points To Be Noted When Selecting A Belt?

Answer»
  • Load of the MACHINE.
  • Speed of the machine.
  • Capacity of machine.
  • Atmosphere of the CLIMATE.
Discussion
58.

What Are The Reasons For Slipping Of Belt?

Answer»

Discussion
59.

What Is The Material Of Belts?

Answer»

BELTS are GENERALLY made by canvas ,rubber, leather and STEEL.

Belts are generally made by canvas ,rubber, leather and steel.
Discussion
60.

What Is Meant By A Belt Drive?

Answer»

When power is driven from driver PULLEY to driven pulley by means of belt , it is KNOWN as belt drive. In open belt drive both the pulleys RUN in the same direction and in CROSS belt drive both the pulleys run in OPPOSITE direction to each other.

When power is driven from driver pulley to driven pulley by means of belt , it is known as belt drive. In open belt drive both the pulleys run in the same direction and in cross belt drive both the pulleys run in opposite direction to each other.
Discussion