expansive mortar, soundless cracking agent, quarrying tools, rock drilling tools, Demolition tools, Construction
expansive mortar, soundless cracking agent, quarrying tools, rock drilling tools, Demolition tools, Construction
But all extension rods are threaded and made by hollow drill steels, this means usually extension rods are hollow.This hollow hole are usually named flushing hole, used for transmitting water or air during drilling. Two ends threads can be used for connecting couplings, shanks, couplings or bits. Typically two ends of extension rods are male, while sometime one end is male and another one is female, then we call it M/F rod. We need couplings to connect extension rods, while for M/F rods, because one end is female, so couplings are not necessary.
Specifications:
Thread sizes: R22, R25, R28, R32, R35, R38, T38, T45, T51;
Rods diameter: round 32mm, round 39mm, round 46mm, round 52mm, Hex.22mm, Hex.25mm, Hex.28mm, Hex. 32mm, Hex. 35mm;
Effective lengths:600mm ~ 6400mm;
Rods Dimension |
Length |
Driven Thread |
Suitable Bits Thread |
Drilling Hole Range |
||||
M-M |
M-F |
|||||||
mm |
foot |
mm |
foot |
mm |
inch |
|||
Hex.25 |
915 ~ 3700 |
3 ~ 12 |
610 ~ 1220 |
2 ~ 4 |
R25, R28, R32 |
R25 |
33 ~ 51 |
1 19/64 ~ 2 |
Hex.28 |
2100 ~ 4920 |
6 3/4 ~ 16 |
1220 ~ 3050 |
4 ~ 10 |
R28, R32, R38 |
R28 |
37 ~ 51 |
1 29/64 ~ 2 |
Hex.32 |
2400 ~ 5530 |
7 7/8 ~ 18 |
R28, R32, R38, T38 |
R32 |
40 ~ 64 |
1 37/64 ~ 2 1/2 |
||
Round32 |
915 ~ 4310 |
3 ~ 14 |
915 ~ 4270 |
3 ~ 14 |
R32, R38, T38 |
R32 |
45 ~ 64 |
1 3/4 ~ 2 1/2 |
Hex.35 |
2670 ~ 6100 |
8 5/8 ~ 20 |
3700 ~ 6400 |
12 ~ 21 |
R32, R38, T38 |
R32 |
45 ~ 76 |
1 3/4 ~ 3 |
Round38 |
610 ~ 6095 |
2 ~ 20 |
610 ~ 6095 |
2 ~ 20 |
R38, T38, T45 |
T38, T45 |
57 ~ 89 |
2 1/4 ~ 3 1/2 |
Round45 |
1830 ~ 6095 |
6 ~ 20 |
1525 ~ 6095 |
5 ~ 20 |
T38, T45, T51 |
T45, T51 |
70 ~ 102 |
2 3/4 ~ 4 |
Round51 |
3050 ~ 6095 |
10 ~ 20 |
1525 ~ 6095 |
5 ~ 20 |
T45, T51 |
T45, T51 |
76 ~ 127 |
3 ~ 5 |