Welcome to PRAKASH BALANCING TECHNOLOGIES
Welcome to PRAKASH BALANCING TECHNOLOGIES
Product Description
ISO 1940-1:2003 (E)
| Guidance for Balancing Quality Graders for Rotor in A constant rigid State | ||
|---|---|---|
| Machinery types: General Examples | Banlance Quality Grade G | Mangnitude  Per. Ω |
| Crankshaft drives for large slow marine diesel engines (piston speed below m/s), inherently unbalanced | G 4000 | 4000 |
| Crankshaft drives for large slow marine diesel engines (piston speed below 9m/s), inherently unbalanced | G 16000 | 16000 |
| Crankshaft drives, inherently unbalanced, rigidly mounted | G 630 | 630 |
| Complete reciprocating engines for cars, trucks and locomotives | G 250 | 250 |
| Complete reciprocating engines for cars, trucks and locomotives | G 100 | 100 |
| Cars: wheels, wheel rims, wheel sets, drive shafts, Crankshafts drives, inherently balanced, elastically mounted | G 40 | 40 |
| Agricultural machinery Crankshaft drives, inheerently balancedm rigidly mounted Crushing machines Drive shafts (cardan shafts, propeller shafts) |
G 16 | 16 |
| Aircraft gas turbines Centrifuges (separators, decanters) Elecric motor and generators (of at least 80 mm shaft height) of maximum rated speeds up to 950 r/min Fans Gears Machinery, general Machine-tools Paper machines Pumps Turbo-charger Water turbines |
G 6.3 | 6.3 |
| Compressors Computer drives Electric motors and generators (of at least 80 mm shaft height) of maximum rated speeds above 950 r/min Gas turbines and steam turbines Machine-tool drives Textile machines |
G 2.5 | 2.5 |
| Audio and video drives Grinding machine drives |
G 1 | 1 |
| Gyroscopes Spidles and drives of high-precision systems |
G 0.4 | 0.4 |
Figure : Maximum Permissible residual unbalance 
VIBRATION SEVERITY CHAT & TOLERANCE GUIDE
VIBRATION CRITERION AS PER VDI 2058, ISO 2372, BS 4675 STANDARD
Vibration Severity Criteria for evaluating condition for machines running at the frequency of 10 Hz to 1000Hz. Example of these types of Machine are small, direct-couples Electric Motors and Pumps, Production Motors, Medium Motors, Generators, Steam and Gas Turbines, Turbo Compressors, Turbo Plums and Fans. some of these machines can be coupled rigidly or flexibly or connected though gear. The axis of Rotating shaft may be horizontal, vertical or inclined at any angle
The below given chart helps us to evaluate condition of over all vibration level as per VDI 2056, iso 2372, BS 4675 STANDARDS depending upon the power rating of the Equipment. Based on the same, assessment of the Equipment can be done and its condition can be classified and know
A Typicale example is the standard VDI 2056. The vibration amplitude of the machine during smooth operation can be taken as Good" classfication. The vibration criteria suggests that successive vibration increase of about 2.5 will be more the vibration condition from Good" to "Allowable" to "Just Allowable" to "Not permissible"
