High Frequency Welded Short Diamond Core Drill Bit for Hand Held Machine
A short diamond core drill bit is a type of drill bit specifically designed for cutting through hard materials like concrete, stone, granite, marble, or ceramics, using industrial-grade diamonds as the cutting surface. Unlike longer core drill bits, short diamond core bits are typically used for more precise, shallow drilling tasks.
Size
| Diameter mm | Diameter inch | Overall Length- Effective Length (mm) | Diameter mm | Diameter inch | Overall Length -Effective Length(mm) |
Φ25 | 1″ | 150-110
180-140
200-160
| Φ102 | 4″ | 150-110 180-140 200-160 |
Φ32 | 1-1/4″ | Φ108 | 4-1/4″ | ||
Φ40 | 1-3/5″ | Φ114 | 4-2/9″ | ||
Φ51 | 2″ | Φ120 | 4-5/7″ | ||
Φ56 | 2-1/5″ | Φ127 | 5″ | ||
Φ63 | 2-1/12″ | Φ168 | 6-3/5″ | ||
Φ76 | 3″ | Φ180 | 7″ | ||
Φ83 | 3-1/4″ | Φ188 | 7-13/32″ | ||
Φ89 | 3-1/2″ | Φ200 | 8″ | ||
Φ96 | 3-4/5″ |
Advantages
- Precision and Control:
- The shorter length gives more control over the drilling process, reducing the likelihood of wandering or misalignment.
- Fast Drilling for Shallow Cuts:
- Allows for quick penetration into hard materials without requiring the extended time or effort associated with longer core bits.
- Cost-Effective for Shallow Applications:
- A more affordable option when deep holes are not needed but the durability of diamond cutting edges is still required.
- Portable:
- Easier to transport and maneuver, making them suitable for on-site drilling in tight or limited spaces.
Premium Diamond Material
The core bore drill is high quality steel tube. The diamond teeth are welded to the steel tube by adopting high-frequency welding technology, providing steady and rustproof.
Water muse be necessary for a longer working life.
M22, 1 1/4UNC and 1/2Gas Universal Thread
Senmine core drill bits are compatible with most types of machines. You can install the drill on a diverse rig to meet your working needs and install the bit on your previous rig effortlessly.
Short Useful Length
Senmine core drill bits are equipped with 4 inch barrel depth for deeper hole drilling. As a result, improve working efficiency and expand the scope of application.
Stable Concentric Shaft
Three in one concentric shaft design can provide stable operation and fast drilling, more effective than an ordinary hole drill.
High-frequency Teeth Welding

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Applications
•Concrete and Masonry Work
Ideal for drilling shallow holes in concrete, brick, block and stone, for tasks such as installing mechanical anchors, chemical anchors, wall plugs, conduits and small penetrations for light piping.
•Tile and Ceramic Drilling
Suitable for drilling holes in ceramic tile, porcelain and glass tile when used with proper water cooling and steady feed pressure. This helps avoid cracking, chipping or burning on the finished surface.
•Granite, Marble and Natural Stone
Can be used for light, shallow drilling in natural stone surfaces, for example when installing bathroom accessories, hardware fixings or small decorative anchors in granite, marble and other decorative stone.
•General Shallow Holes in MEP Installation
An efficient solution wherever drilling depth is limited, such as:
- Anchor holes for electrical boxes and cable trays
- Holes for plumbing clips and brackets
- Shallow penetrations for HVAC accessories and mounting hardware
Whenever you do not need a deep core but still want the speed and cleanliness of a diamond core bit, this short series is the practical option.







