|
| Brand Name: | FLRT |
| Model Number: | 12 1/4" FA637G |
| MOQ: | 20pcs |
| Supply Ability: | 300pcs per quarter |
IADC 637G , Tricone Rock Bit, Medium Hard Formation , Sealed Friction Bearing , 311.2mm
RECOMMENDED DRILLING PARAMETERS FOR APPLICATION
|
Types & IADC Code |
417 |
437 447 |
517 527 |
517 527 |
537 547 |
617 627 |
637
|
|
|
WOB |
KN/mm(Bit Dia.) |
0.4~0.9 |
0.4~0.9 |
0.35~1.0 |
0.35~1.0 |
0.5~1.0 |
0.6~1.1 |
0.7~1.2 |
|
Lb/in. (Bit Dia.) |
2285~5142 |
2285~5142 |
2000~5714 |
2000~5714 |
2857~5714 |
3428~6285 |
4000~6857 |
|
|
Rotation Speed (Rpm) |
140~60 |
240~70 |
125~50 |
~60 |
110~50 |
100~40 |
80~4 |
|
ROLLER CONE BIT BEARING ASSEMBLY
Journal bearing bits do not have roller bearings.
The cones are mounted directly onto the journal.
This offers the advantage of a larger contact area over which the load is transmitted from the cone to the journal.
The contact area is specially treated and inlaid with alloys to increase wear resistance.
Only a small amount of lubrication is required as part of the sealing system.
Ball bearings are still used to retain the cones on the journal.
