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RBM-DP,11-1/4",Customized
ETERNAL
Product Specification
1. Size: 11-1/4",OD286.5*L839,Customized
2. Material: Alloy steel 4145H
3.Product Procedure:Forging,heat treatment,lathe machining
4. Heat treatment: Quenching and tempering
5. Surface treatment: Surface quenching
6. Surface hardness: HRC55-62
7. Transport packaging: Wooden case
Mechanical property
Tensile strength : min 970MPA
Yield strength : 755MPA,
Impact value :min 54J
Elongation:min 13%
Reduction of Area:min 45%
Size and technical specification
Norminal size | Shoulder to shoulder length | Small bore diameter | Diam.of boreback | Length of boreback | shoudler to first spanner flat | Width of spanner flat | Shoudler to end of spanner flats | Dimension across spanner flat | Connections | Weight |
A | B | C | D | E | F | G | H | |||
in mm | in mm | in mm | in mm | in mm | in mm | in mm | in mm | in mm | kg | |
8”203.2 | 48"1219.2 | 4-3/4“120.7 | 6 5/32"156.4 | 22”558.8 | 1 1/2"38.1 | 2 3/4”69.9 | 8 1/4"209.6 | 6 7/8“174.6 | 6 3/4"R.B.-DI22 | 170 |
10”254 | 60”1524 | 4-3/4"120.7 | 7 7/16“188.9 | 36"914.4 | 1 1/2"38.1 | 2 3/4”69.9 | 8 1/4"209.6 | 8”203.2 | 8 1/4"RB-D122 | 345 |
11-1/4”286.8 | 60"1524 | 4-3/4”120.7 | 7 11/16”195.3 | 36"914.4 | 1 1/2"38.1 | 3 1/2”88.9 | 10"254 | 9"228 | 9 1/4"R.B.-DI22 | 480 |
12-7/8”323.9 | 60”1524 | 5-7/16"138.1 | 9”228.6 | 36”914.4 | 1 9/16”39.7 | 3 15/16"100 | 11"279 | 10 1/2”266.7 | 10 1/2"RB.-D122 | 640 |
12-7/8”323.9 | 120"3048 | 5-7/16"138.1 | 9”228.6 | 96”2438.4 | 1 9/16”39.7 | 3 15/16”100 | 11"279 | 10 1/2”266.7 | 10 1/2"R.B.-DI22 | 1270 |
Product feature
1. Choose high strength forging material, including 4140, 4330V, 4330V MOD
2. Through quenching and tempering heat treatment, carry out sample test on each piece drill pipe
3. CNC turning DI22 thread with high strength, every thread has two starts
4145H material chemical specification
Application
This kind of drill pipes are used for raise boring machines.Raise boring machines are always used for all kinds of tunnel,including mine tunnels and mine shafts.
Product Specification
1. Size: 11-1/4",OD286.5*L839,Customized
2. Material: Alloy steel 4145H
3.Product Procedure:Forging,heat treatment,lathe machining
4. Heat treatment: Quenching and tempering
5. Surface treatment: Surface quenching
6. Surface hardness: HRC55-62
7. Transport packaging: Wooden case
Mechanical property
Tensile strength : min 970MPA
Yield strength : 755MPA,
Impact value :min 54J
Elongation:min 13%
Reduction of Area:min 45%
Size and technical specification
Norminal size | Shoulder to shoulder length | Small bore diameter | Diam.of boreback | Length of boreback | shoudler to first spanner flat | Width of spanner flat | Shoudler to end of spanner flats | Dimension across spanner flat | Connections | Weight |
A | B | C | D | E | F | G | H | |||
in mm | in mm | in mm | in mm | in mm | in mm | in mm | in mm | in mm | kg | |
8”203.2 | 48"1219.2 | 4-3/4“120.7 | 6 5/32"156.4 | 22”558.8 | 1 1/2"38.1 | 2 3/4”69.9 | 8 1/4"209.6 | 6 7/8“174.6 | 6 3/4"R.B.-DI22 | 170 |
10”254 | 60”1524 | 4-3/4"120.7 | 7 7/16“188.9 | 36"914.4 | 1 1/2"38.1 | 2 3/4”69.9 | 8 1/4"209.6 | 8”203.2 | 8 1/4"RB-D122 | 345 |
11-1/4”286.8 | 60"1524 | 4-3/4”120.7 | 7 11/16”195.3 | 36"914.4 | 1 1/2"38.1 | 3 1/2”88.9 | 10"254 | 9"228 | 9 1/4"R.B.-DI22 | 480 |
12-7/8”323.9 | 60”1524 | 5-7/16"138.1 | 9”228.6 | 36”914.4 | 1 9/16”39.7 | 3 15/16"100 | 11"279 | 10 1/2”266.7 | 10 1/2"RB.-D122 | 640 |
12-7/8”323.9 | 120"3048 | 5-7/16"138.1 | 9”228.6 | 96”2438.4 | 1 9/16”39.7 | 3 15/16”100 | 11"279 | 10 1/2”266.7 | 10 1/2"R.B.-DI22 | 1270 |
Product feature
1. Choose high strength forging material, including 4140, 4330V, 4330V MOD
2. Through quenching and tempering heat treatment, carry out sample test on each piece drill pipe
3. CNC turning DI22 thread with high strength, every thread has two starts
4145H material chemical specification
Application
This kind of drill pipes are used for raise boring machines.Raise boring machines are always used for all kinds of tunnel,including mine tunnels and mine shafts.
