• ### Latest blog posts

#### G-TECH Services, Inc.

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G-TECH Services, Inc. is...

rhicav12 16th Mar '16 16:12

#### Accuracy of Mould Preparation

The accuracy of preparation of parts of a mold for plastic injection molding is determined by the...

Bhavani_singh 22nd Nov '15 23:34

#### Basic Knowledge on the Mould Clamping Force

When a injection mold is fixed in a molding machine and molten plastic is injected into the...

Bhavani_singh 22nd Nov '15 23:28

#### Have a knowledge of the silicone mold

Have a knowledge of the silicone mold

Before having a knowledge of the silicone mold, let us...

JackYan01 24th May '15 10:28

#### Have a knowledge of the plastic blowing mold

Have a knowledge of the plastic blowing mold

Plastic blowing mold is mainly the hollow blow...

JackYan01 21st May '15 18:02

• # Brake design - calculations

Brakes are machine elements that absorb kinetic or potential energy in the processes of slowing down or stopping a moving part. The absorbed energy is dissipated as heat. Break capacity depend upon unit pressure between the breaking surfaces, the coefficient of friction and ability of the brake to dissipate heat equivalent to energy absorbed. The performance of brake is similar to that of clutches except the clutches connect one moving part to another moving part, where brake connects a moving part to a frame.

• External Shoe or Block Brakes
• Single Block Brake
• Double Shoe Brake
• Internal Shoe Brake
• Band Brake

Heat Generated = p Ac f V / 778 [Btu/min]
Where:
p = average contact pressure
Ac = contact area, in²
f = coefficient of friction
V = peripheral velocity of drum

 Material Max Temp °F f Pmax, psi Metal on metal 600 0.25 200 Wood on metal 150 0.25 70 Leather on metal 150 0.35 25 Asbestos on metal in oil 500 0.40 50 Sintered metal on cast iron in oil 500 0.15 400
1. yct08280 -
Nice one...!
1. yct08280 -
Nice article...need more calculation...
• ### Recent forum posts

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Check out clamp on drill guides from wolfcraft or other wood working tool companies. They are designed to drill dowel pin holes at a true 90 deg to the

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Työn kuvaus:

With interesting new tasks, excellent resources

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#### Can hardware store hex couplings be used as drill guides?

Use a "real" drill bushing, from somebody like Carr-Lane, or make one from solid steel stock. Not only are hardware store coupling nuts fairly

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#### Can hardware store hex couplings be used as drill guides?

It's just that I don't have the steel bushing but I have the bearing and it will only take whatever forces will be there in 50 holes. I don't think that

thorq 21st Apr '16, 19:01

#### Can hardware store hex couplings be used as drill guides?

Interesting!

The problem with bearings is most are designed only for radial loads unless you get a thrust bearing or others that support

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