machine design Archives - Mazurek Gravity

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Anonymous

Asked: 1 month agoIn: Mechanical Engineering

What is a spring index?

Anonymous

Asked: 1 month agoIn: Mechanical Engineering

What is caulking and fullering?

Anonymous

Asked: 1 month agoIn: Mechanical Engineering

Discuss the terminology of gear with neat diagram.

Anonymous

Asked: 1 month agoIn: Mechanical Engineering

Define law of gearing.

Mazurek GravityPundit

Asked: 1 month agoIn: Mechanical Engineering

In the band and block brake as shown in fig below, the band is lined with 12 blocks each of which subtends an angle of 15° at the center of the rotating drum. The thickness of block is 75 mm and diameter of drum is 850 mm. When the brake is in action, the greatest and least tensions in the brake strap are T1 and T2, then derive the relation of ratio between tensions. Also calculate the least force required at C for the block to absorb 250kW at 260 rpm. The coefficient of friction for brake is 0.4. All dimensions are in mm.

In the band and block brake as shown in fig below, the band is lined with 12 blocks each of which subtends an angle of 15° at the center of the rotating drum. The thickness of block is ...Read more

Anonymous

Asked: 1 month agoIn: Mechanical Engineering

For a close-coiled helical spring subjected to an axial load of 300N having 12 active number of coils of wire diameter of 16 mm, and made with mean coil diameter of 250 mm, find axial deflection, strain energy stored, maximum torsional shear stress in the wire and maximum shear stress using Wahl’s correction factor.

For a close-coiled helical spring subjected to an axial load of 300N having 12 active number of coils of wire diameter of 16 mm, and made with mean coil diameter of 250 mm, find axial deflection, strain energy ...Read more

Mazurek GravityPundit

Asked: 1 month agoIn: Mechanical Engineering

A shaft 50mm in diameter is transmitting power at maximum shear stress of 110 MPa. If pulley is connected to the shaft by means of a square key, so that shear stress in key is not to exceed 50 MPa, crushing stress not to exceed 100 MPa. Find the length of key. (length of key is 5 times the width of key)

A shaft 50mm in diameter is transmitting power at maximum shear stress of 110 MPa. If pulley is connected to the shaft by means of a square key, so that shear stress in key is not to exceed ...Read more

Mazurek GravityPundit

Asked: 1 month agoIn: Mechanical Engineering

A steel plate 100 mm wide and 10 mm thick is joined with another steel plate by means of single transverse and double parallel fillet weld as shown in figure below. The strength of the plates to be joined is equal to strength of welded joint. The permissible tensile and shear stress for weld and plate material are 70 MPa and 50 MPa, respectively. Find the length of each parallel fillet weld.

A steel plate 100 mm wide and 10 mm thick is joined with another steel plate by means of single transverse and double parallel fillet weld as shown in figure below. The strength of the plates to be ...Read more

Mazurek GravityPundit

Asked: 1 month agoIn: Mechanical Engineering

Discuss the terminology of the thread with diagram. Also discuss the different forms of thread with their applications.

Anonymous

Asked: 1 month agoIn: Mechanical Engineering

A double riveted double cover butt joint is made of 12mm thick plates. By considering suitable rivet diameter (use Unwin’s formula) for this joint find the efficiency of joint. Also draw the sketch of the riveted joint. Take shear and crushing strength for rivet material as 80 MPa and 160 MPa and tearing strength of plate material is 115 MPa. (pmax = 3.5t+ 41.28 mm)

A double riveted double cover butt joint is made of 12mm thick plates. By considering suitable rivet diameter (use Unwin’s formula) for this joint find the efficiency of joint. Also draw the sketch of the riveted joint. Take ...Read more