Shield TBM cutter for underground tunnelling
Description:
A tunnel boring machine (TBM) is a machine used to excavate tunnels
with a circular cross section
through a variety of soil and rock strata. There have a very big
circle blade in the front of tunnel
boring machineequipped with various kinds of cutters, in order to
promote stable and longer lasting
life of application, we have research and developed special
tungsten carbide materials suited to your
application.The TBM technology is mainly used in underground ming
and traffic tunnelling like metro,
railway and road tunneling.
Grade and Applications:
| Grade | Density | T.R.S | Hardness | Performance & application recommended |
|
| g/cm3 | MPα | HRA |
| MK4 | 15.1 | 1800 | 90.0 | Mainly used as small buttons for percussion bits to cut soft and
medium
hard formations. |
| MK6 | 14.9 | 2000 | 90.5 | For coring crowns, electric coal drill bits, coal cutting picks,
oil cone bits
and scraping knife bits, usd in geological prospecting, coal mining
and
oil well boring. |
| MK8 | 14.7 | 2400 | 89.7 | For coring crowns, electric coal drill bits, coal cutting picks,
cone drill bits
and scraping knife bits, used in geological prospecting, coal
mining and
oil well boring. |
| MK10 | 14.7 | 2450 | 88.5 | Mostly used as the buttons of small and mediumsized percussion bits
and
as the inserts of rotary prospecting bits to cut soft and medium
hard formations. |
| MK15 | 14.6 | 2450 | 87.8 | Suitable to strips, conical buttons for rotary
percussion-resistant, geological prospecting buttons, cut soft and
medium hard formations. |
| MK20 | 14.4 | 2550 | 87.0 | Primarily for the buttons and inserts of rotary percussion bits to
cut medium-hard and hard formations. |
| MK25 | 14.5 | 2600 | 87.5 | Primarily for the buttons and inserts of rotary percussion bits to
cut medium hard
and very hard formations. |
| MK30 | 14.4 | 2600 | 87.0 | Largely for the inserts and buttons of percussion bits and tricone
bits to cut medium-hard, hard, and very hard formations. |
| MK40 | 14.2 | 2650 | 86.5 | Predominatly for the buttons of tricone bits and inserts of rotary
percussion bits to cut hard and vey hard formations. |
| MK50 | 14.0 | 2700 | 86.0 | For oil cone drill bits, for medium soft and medium -hard rocks. |
| MK60 | 14.0 | 2500 | 87.0 | Good strength and less wear resistance, for bits of rotary hammer
rock drills and heavy rock drills, for hard and very hard rocks. |
Other grades may be offered by customers' requirements
Competitive Advantage:
1. Expertise in tungsten carbide for 15 years, we can assit you in
choosing the optimum grade for your job
2. 100% new material.
3. Be more durable.
4. OEM & ODM Service.
5. All payment terms supported.
6. Fast delivery time & Convenient Transportation.
