Case one: bearing raceway sound and control methods Raceway sound is when the bearing is running, the rolling body rolling on the rolling surface and issued a slippery continuous sound, all rolling bearings will occur unique to the basic sound . The general bearing sound is the rolling sound plus other sounds. Ball bearing roller sound is irregular, the frequency of more than 1000Hz, its main frequency does not vary with the speed, but its total sound pressure level increases with the speed increase. Rolling sound big bearings, the sound pressure level of its raceway sound decreases with the increase of viscosity; and the small raceway sound pressure, the sound pressure level in the viscosity increases to about 20mm2 / s or more, by reducing the turn To increase. The greater the rigidity of the bearing seat, the lower the total sound pressure level of the raceway sound. If the radial clearance is too small, the total sound pressure level of the raceway sound and the main frequency will increase sharply with the reduction of the radial clearance. The method of controlling the raceway sound is: Use low noise bearing that is a very small waviness bearings, carefully choose the conditions of use. Rolling often affect the noise of the entire machinery, reducing raceway noise can reduce the noise of the entire machinery. Scenario 2: Impact sound of rolling elements and its control method Larger models of ball bearings or cylindrical roller bearings operate under low speed with purely radial load. Due to the small centrifugal force of the rolling elements, the rolling elements in the non-load area will Impact cage or raceway and make noise. But with the speed increase, this sound will disappear. The rolling body impact sound control methods are: Appropriate to reduce the radial clearance, the use of a reasonable structure and the material has the flexibility of the cage bearing. Scenario 3: Rolling noise of bearings and how they are controlled Rolling noise is the harsh metal friction noise that can occur on cylindrical roller bearings on all occasions, mostly in larger grease lubricated bearings, whereas in base oil properties Degraded grease is more likely to occur and hardly occurs when oil is lubricated. In addition, it is easy to happen in winter and when it is subjected to pure radial load, it is easy to occur when the radial clearance is large, and it will occur easily in a specific speed range depending on the model size. Will appear intermittently. Outer ring raceway to take special processing methods to prevent the emergence of rolling sound, if necessary, choose this bearing, or appropriate to reduce the radial bearing clearance, the use of high performance grease and improve the rigidity of the bearing and matching parts .
Flap Disc Adhesive Glue
We supply full range of abrasive tools, such as Flap Disc adhesive, Flap Disc Backing Pad, Abrasive Flap Disc, Flap Wheels , flap wheel with shaft, Abrasive Sanding Disc, Abrasive Machine , etc...
both one component epoxy adhesive and two component epoxy adhesive.
Specifications for single component epoxy adhesive for flap disc:
Appearance: Colloidal
Color: Blue / White
Odour: Slight odour
Proportion(water=1):1.42
Viscosity (25℃, mpa.s): 15000~20000
Storage time: 5℃ 6 months
Recommended curing condition: 110~130℃×4~3 hours or 150~160℃×1 hour
Hardness(Shore D): ≥90
Recommended temperture on the machine: 40-52 degree
Shearing strength(23℃, steel/steel, MPa): ≥22
Flap Wheel Glue Instructions
According to the ambient temperature, preheat adhesive among 41 ~ 46℃ before pumping into the pumping system.
Note:
1.When climate is colder, adjust preheating temperature 3 ~ 5℃ higher than normal.
2.Before use large quantities,a small quantity should be used for test.
3.This flap disc glue is a chemical product, can cause weak corrosive to skin, please note that the use of the appropriate protection, such as inadvertent contact with the skin with plenty of water rinse or alcohol wash.
4.Baking temperature is particularly important for product quality. The data provided by us is tested under accurate oven temperature control. We are strongly advised customer should adjust oven temperature according to the customer's on site condition.
Storage and transportation
Flap Disc Adhesive resin glue should keep in cool, ventilated warehouse, temperature does not exceed 40℃, relative humidity of not more than 85% ,this product is not special goods, according to the general cargo transport.
Flap Disc Adhesive Glue,Flap Wheel Glue,2 Component Epoxy Glue,Flap Wheel Adhesive,Epoxy Resin Flap Wheel Glue
Zhengzhou Jiading Abrasive Manufacturing Co.,Ltd , https://www.jd-abrasives.com