S type Two pipe ejector drill head
S typeTwo pipe ejector drill head and insert and pad
Compare with single tube BTA, Ejector ones have higher efficiency, Tube with super high strength alloy steel, more stable, especially machining for carbon steel,Alloy steel,Stainless steel.
- We can supply whole set two pipe ejector drill head, insert,pad ,drill pipe, connect etc.
- Machining process reference →
Example of Goods
800.24 insert and pad design list
| Drilling head diameter | Central inserts | Qty | Intermiddle insets | Qty | Peripheral inserts | Qty | Guide pad | Qty |
| 25～28.7 | 800－050308M-C-G | 1 | 800－050308M-I-G/L | 1 | 800－060308H-P-G/L | 1 | 800-06A | 2 |
| 28.71～31.00 | 800－06T308M-C-G | 1 | 800－050308M-I-G/L | 1 | 800－060308H-P-G/L | 1 | 800-06A | 2 |
| 31.01～33.30 | 800－06T308M-C-G | 1 | 800－060308M-I-G/L | 1 | 800－08T308H-P-G/L | 1 | 800-07A | 2 |
| 33.31～36.20 | 800－08T308M-C-G | 1 | 800－06T308M-I-G/L | 1 | 800－08T308H-P-G/L | 1 | 800-07A | 2 |
| 36.21～39.6 | 800－08T308M-C-G | 1 | 800－08T308M-I-G/L | 1 | 800－08T308H-P-G/L | 1 | 800-07A | 2 |
| 39.61～43 | 800－08T308M-C-G | 1 | 800－08T308M-I-G/L | 1 | 800－09T308H-P-G/L | 1 | 800-08A | 2 |
| 43.01～47.00 | 800－10T308M-C-G | 1 | 800－08T308M-I-G/L | 1 | 800－09T308H-P-G/L | 1 | 800-08A | 2 |
| 47.01-51.7 | 800-10T308M-C-G | 1 | 800－08T308M-I-G/L | 1 | 800－11T308H-P-G/L | 1 | 800-10A | 2 |
| 51.71-56.2 | 800-10T308M-C-G | 1 | 800－12T308M-I-G/L | 1 | 800－11T308H-P-G/L | 1 | 800-10A | 2 |
| 56.21-59 | 800-10T308M-C-G | 1 | 800－12T308M-I-G/L | 1 | 800－11T308H-P-G/L | 1 | 800-12A | 2 |
| 60-65 | 800-12T308M-C-G | 1 | 800－12T308M-I-G/L | 1 | 800－11T308H-P-G/L | 1 | 800-12A | 2 |
Out drill pipe and inner drill pipe choose parameter
| Drilling head diameter | Drill pipe range | Out pipe Order NO. |
Size 400 630 1070 |
Dmm dmt D21 l1 | Inner pipe order NO. | Size 430 660 1100 |
D22 | D23 |
| 25～26.4 | 03 | 424.2-803- | 2 3 4 | 23.5 21 16 30 | 424.2-853- | 2 3 4 | 16 | 14 |
| 26.4～28.7 | 04 | 424.2-804- | 2 3 4 | 26 23.5 18 33 | 424.2-854- | 2 3 4 | 18 | 16 |
| 28.71～31.00 | 05 | 424.2-805- | 2 3 4 | 28 25.5 20 33 | 424.2-855- | 2 3 4 | 20 | 18 |
| 31.01～33.30 | 06 | 424.2-806- | 2 3 4 | 30.5 28 22 33 | 424.2-856- | 2 3 4 | 22 | 20 |
| 33.31～36.20 | 07 | 424.2-807- | 2 3 4 | 33 30 24 40 | 424.2-857- | 2 3 4 | 24 | 22 |
| 36.21～39.6 | 08 | 424.2-808- | 2 3 4 | 35.5 33 26 40 | 424.2-858- | 2 3 4 | 26 | 24 |
| 39.61～43 | 09 | 424.2-809- | 2 3 4 | 39 36 29 40 | 424.2-859- | 2 3 4 | 29 | 27 |
| 43.01～47.00 | 10 | 424.2-810- | 2 3 4 | 42.5 39 32 40 | 424.2-860- | 2 3 4 | 32 | 30 |
| 47.01-51.7 | 11 | 424.2-811- | 2 3 4 | 46.5 43 35 44 | 424.2-861- | 2 3 4 | 35 | 32 |
| 51.71-56.2 | 12 | 424.2-812- | 2 3 4 | 51 47 39 44 | 424.2-862- | 2 3 4 | 39 | 36 |
| 56.21-65 | 13 | 424.2-813- | 2 3 4 | 55.5 51 43 44 | 424.2-863- | 2 3 4 | 43 | 40 |
Connector and collet ,seal sleeve structure display
Example of Goods
