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Raise Boring Drill Pipe size from 8" to 15"

Name: Raise Boring Drill Pipe size from 8" to 15"
Brand: ETERNAL
Rating: 5.0 (50 reviews)

ETERNAL company specialize on manufacturing raise boring drill pipes from 8" to 15" ,which are applicated to bore all kinds of tunnels and shafts . They choose high strength alloy steel forgings materials and heat treatment. Therefore they have excellent mechanical properties and impact values.In the past years , RBM drill pipes ( drill rod ) have been exported to many countries, such as South Africa , Brazil , Chile , Mexico , Russian , Vietnam , Korea etc.They could be installed on machines of Atlas Copoc,Robbins,NFM,etc .

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Model:
RBM-DP,8" to 15",Customized
Brand:
ETERNAL

Product Description

Product Specification

1. Size: 8" to 15",Customized

2. Material: Alloy steel

3.Product Procedure:Forging,heat treatment,lathe machining

4. Heat treatment: Quenching and tempering

5. Surface treatment: Surface Phosphating, etc

6. Surface hardness: Hb325-365

7.Mechanical property:Tensile strength : min 1035MPA, Yield strength : 965MPA, Impact value :min 90J

8. Transport packaging: Wooden case

9. Service: Customization

10. Warranty period: One year

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	65/32"156.4	22”558.8	11/2"38.1	23/4”69.9	81/4"209.6	67/8“174.6	63/4"R.B.-DI22	170
10”254	60”1524	4-3/4"120.7	77/16“188.9	36"914.4	11/2"38.1	23/4”69.9	81/4"209.6	8”203.2	81/4"RB-D122	345
11-1/4”286.8	60"1524	4-3/4”120.7	711/16”195.3	36"914.4	11/2"38.1	31/2”88.9	10"254	9"228	91/4"R.B.-DI22	480
12-7/8”323.9	60”1524	57/16"138.1	9”228.6	36”914.4	19/16”39.7	315/16"100	11"279	101/2”266.7	101/2"RB.-D122	640
12-7/8”323.9	120"3048	57/16"138.1	9”228.6	96”2438.4	19/16”39.7	315/16”100	11"279	101/2”266.7	101/2"R.B.-DI22	1270

Production 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

Material chemical specification

C: 0.28 Min./0.37 Max.

Mn: 0.45Min./0.65Max.

Si: 0.1 Min./0.3 Max.

Ni: 2 Min./3 Max.

Cr: 0.8 Min./1.1 Max.

Mo: 0.4 Min./0.65 Max.

V: 0.05 Min./0.15 Max.

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.