LUOYANG MONTON BEARING SCIENCE & TECHNOLOGY CO.,LTD.
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128720A 100*176*400mm Mudstack thrust bearings Oil drilling motor bearing

128720A 100*176*400mm Mudstack Thrust Bearings Oil Drilling Motor Bearing

Reference FOB Price:
US1 ~ 1000 / Piece
Min. Order:
1 Piece
Stock:
100 Piece
Production Capacity:
1000PCS/WEEK
Port:
Shanghai
Payment term:
T/T
Delivery time:
7-35days
Technical Parameters:
Product Designations:
128720A
Old Designations:
128720A
HS Code:
84821000.00
Structure:
Calls
Number of Rows:
Multi row
Inside Diameter:
100 mm
Outside Diameter:
174 mm
Thickness:
656 mm
Demensions:
100*174*656mm
Weight:
25 KG
Basic dynamic load rating (Cr):
1000KN
Basic static load rating (Cor):
2500KN
Reference speed (Grease rpm):
3000RPM
Limiting speed (Oil rpm):
4500RPM
Brand:
MONTON
Clearance:
C0
Precision Rating:
P5
Vibration:
Z1V1
Load Direction:
Radial
Bearing Material:
Gcr15
Cage:
no cage
Seals Type:
no seals
Number of Balls:
75
Ball Material:
Gcr15
Contact Angle:
90
Gear Options:
no gear
Transport Package:
Wooden case
Shipping Ways:
Sea/Air
Country of Origin:
China
Service:
Good
Quality Control:
Self control
Feature:
Balls
Application:
Mud motor
128720A 100*176*400mm Mudstack Thrust Bearings Oil Drilling Motor Bearing

128720A 100*176*400mm Mudstack thrust bearings  Oil drilling motor bearing

 

Model of Drilling Tools Bearings d D H
LZ203 128720A 100 176 400

 

Mud Motor Radial Bearing

 A mud motor bearing assembly, comprising: a stationary housing having an inner wall surface defining an interior bore; a rotatable drive shaft extending through the interior bore of the stationary housing, the rotatable drive shaft having a tubular drive shaft with a uniform outer diameter terminating at an outlet section with an enlarged outer diameter, the rotatable drive shaft including an inner bore for passage of a drilling fluid; a bearing section bearing a radial load and an axial load, the bearing section including at least a pair of stationary bearing rings and at least a pair of rotating bearing rings in stacked arrangement, each of the stationary bearing rings having an inner periphery and an outer periphery, the outer periphery of each of the stationary bearing rings operatively engaged to the inner wall of the stationary housing, the inner periphery of each of the stationary bearing rings including a projection, each of the rotating bearing rings having an inner periphery and an outer periphery, the inner periphery of each of the rotating bearing rings operatively engaged to the tubular drive shaft, the outer periphery of each of the rotating bearing rings including a projection, the projections of the pair of stationary bearing rings forming a recess that accommodates the projection of one of the pair of rotating bearing rings in sliding engagement; wherein the stacked arrangement alternates between at least partially overlapping stationary bearing rings and rotating bearing rings.

 

Mud motor bearings

Mud motor bearings, or ball bearings have conventionally been used to react thrust, or axial, loads in down hole mud motors. When low rpm power sections are used in the application such bearings provide sufficient life and reliability. However, bearing component fatigue causes life to decrease linearly as speed increases. This fatigue makes ball bearings unsuitable for high rpm motors. Standard engineering practice dictates that ball bearings are specified according to L10 life, or the number of revolutions a group of identical bearings is expected to sustain before 10% fail. As revolutions are related to speed, bearings operating in a higher speed motor will fail before those operating in a low speed motor, e.g. one could roughly expect a 90% reduction in bearing life if speed was increased from 100 to 1000 rpm. In addition to life, friction and horsepower losses are often of interest in drilling. Ball bearings are referred to as frictionless bearings due to the rolling nature of the elements, however in practice frictional losses exist due to rolling resistance and sliding. An order of magnitude approximation of the coefficient of friction (cof) for an angular contact bearing operating in ideal non-abrasive lubricant conditions is 0.0032.1 In drilling mud, the cof can be assumed to be significantly higher.

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