Diamond Products Core Bore 35478 - 5 Inch Star Blue Dry Hole Saw Core Bore Bit
Dry-cutting convenience
The bit is designed to core without water, helping simplify setup where wet drilling is undesirable or impractical.
Star Blue dry masonry core bit
Light-duty dry coring for block and soft brick
The Diamond Products Core Bore BDB5000 Star Blue dry hole saw creates 5-inch openings in block and soft brick without water. Its 9-inch listed length supports deeper penetrations, while cooling slots help release heat during intermittent dry coring. The 5/8-inch-11 threaded hub fits compatible right-angle grinders and handheld core drills.
- 5 in diameter
- 9 in listed length
- 5/8 in-11 hub
- 700 to 3,500 RPM
Practical coring value for suitable masonry
Catalog number 35478 is built for light-duty dry drilling where an economical diamond core bit is appropriate. Diamond Products describes the Star Blue range as offering good-quality diamond and good coring life for its intended brick-and-block applications.
Air-cooling slots
Slots in the core barrel promote airflow and help the bit cool when used with the manufacturer's intermittent-cut technique.
5-inch opening size
The BDB5000 is sized for large service penetrations and other 5-inch holes in compatible block and soft-brick construction.
Common threaded hub
The 5/8-inch-11 connection mounts directly to compatible equipment or can be adapted to a suitable 1/2-inch drill chuck.
Recommended applications
- Openings in compatible masonry block
- Penetrations through soft brick
- Light-duty mechanical and electrical service holes
- Vent, pipe, conduit, and cable-routing openings
- Dry coring where the substrate is confirmed compatible
Compatible equipment
- Right-angle grinders with a 5/8-inch-11 spindle
- Handheld core drills with a matching connection
- Minimum 10-amp power tool for this 5-inch size
- Tool speed adjustable within 700 to 3,500 RPM
- Optional pilot or chuck adapter when required
Adapters, pilot drills, drilling tools, and dust-control equipment are separate unless the seller states otherwise.
Confirm the base material before drilling
The Star Blue bond is application-specific. Matching the bit to the substrate is essential for cutting performance, bit life, and safe operation.
Use for: block and soft brick
Choose this model for light-duty dry coring in compatible concrete masonry block and softer brick. Because brick and block compositions vary, consult the manufacturer when material suitability is uncertain.
Do not use for: concrete or aggregate
Diamond Products explicitly states that Star Blue dry hole saws are not for concrete. Select a core bit designed for concrete, reinforcement, or harder aggregate when those materials are present.
Product specifications
| Brand | Diamond Products |
|---|---|
| Product line | Core Bore Star Blue |
| Part number | BDB5000 |
| Catalog number | 35478 |
| eGrimesDirect SKU | CT DCO BDB5000 |
| Barcode / UPC | 603461354783 |
| Product type | Diamond dry hole saw / dry core bit |
| Diameter | 5 in |
| Listed length | 9 in |
| Hub / arbor connection | 5/8 in-11 threaded |
| Recommended materials | Block and soft brick |
| Concrete suitability | Not for use on concrete |
| Operating method | Dry coring with intermittent cuts for air cooling |
| Speed range for 5 in size | 700 to 3,500 RPM |
| Minimum tool amperage | 10 amps |
| Selling multiple | 1 bit |
| Country of origin | South Korea |
Product dimensions, barcode, selling multiple, and country of origin reflect the current eGrimesDirect listing. Confirm current packaging and equipment compatibility before ordering.
Dry-coring setup and safety
Confirm that the wall is free of energized wiring, pressurized services, and other hidden hazards before drilling. Inspect the bit, segments, hub, adapter, and tool before every use, then secure the work area and use the correct guard or auxiliary handle specified for the power tool. Operate only within 700 to 3,500 RPM and never exceed the lowest rating marked on any component. Use intermittent cuts so airflow can cool the dry bit, and never add water unless the equipment and procedure are specifically approved for it. Control respirable silica dust using compliant engineering controls and wear suitable eye, face, hearing, hand, respiratory, and protective equipment. Follow all instructions supplied with the bit, drill, grinder, adapters, and dust-control system.
Frequently asked questions
Can Diamond Products 35478 drill concrete?
No. Diamond Products specifies the Star Blue series for block and soft brick and explicitly states that it is not for concrete. Choose a concrete-rated bit if the substrate contains concrete, hard aggregate, or reinforcement.
Does this core bit require water?
No. BDB5000 is a dry hole saw. The manufacturer calls for intermittent cuts that allow air to cool the bit, and the barrel slots assist cooling. Follow the bit and tool instructions rather than introducing water to equipment intended for dry operation.
What drill or grinder can run the 5-inch Star Blue bit?
Diamond Products lists dry hole saws for compatible right-angle grinders and handheld core drills. For the 5-inch Star Blue model, the published range is 700 to 3,500 RPM with a minimum 10-amp tool. The bit has a 5/8-inch-11 hub, and a separate straight-shank adapter is available for compatible 1/2-inch drill chucks.
What is included with catalog number 35478?
The listing is for one BDB5000 Star Blue 5-inch dry core bit. A power tool, pilot drill, chuck or pilot adapter, and dust-control accessories are not identified as included and should be selected separately when needed.
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