BAUMR-AG 152mm Diamond Core Drill Bit Guide: 1-1/4 UNC Wet/Dry Coring

BAUMR-AG 152mm Diamond Core Drill Bit

The BAUMR-AG TOLBITBMRA152 is a large 152mm diamond core bit with a 1-1/4" UNC threaded connection. It is part of BAUMR-AG’s masonry core-bit range and is intended for use with compatible core-drilling equipment rather than a standard household drill.

Current Edisons information gives a 152mm cutting diameter, 455mm overall length for this size range, 10mm diamond/steel cutting teeth and a product weight of approximately 4.45kg.

The merchant markets the bit for wet and dry coring in concrete, brick, granite, tile, marble, stoneware, Poroton, cellular concrete and Ytong. That broad material list does not remove the need to match the bit to the exact drill, material and job.

Testing statement: Firebusters has not personally drilled with this bit. This guide is based on current BAUMR-AG/Edisons product information and authoritative Victorian silica-control guidance checked in October 2026.

Key Specifications

152mm BAUMR-AG Core Bit at a Glance

BAUMR-AG · TOLBITBMRA152

152mm Diameter · 455mm Length · 1-1/4" UNC

This is a specialist large-diameter core bit. Its 1-1/4" UNC threaded fitting is common on dedicated core-drilling machines, including several current BAUMR-AG rigs, but thread size is only the first compatibility check.

View 152mm Core Bit →

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What Does 455mm Length Mean?

The original recovery draft confused the 10mm cutting-teeth length with overall bit length.

Edisons’ current drill-bit category information states that the 20mm bit is 370mm long, while the larger BAUMR-AG sizes from 53mm through to 152mm are 455mm long.

The 10mm figure on the product page refers to the diamond cutting teeth or segment height, not the full steel core barrel.

A long core barrel can reach through substantial masonry thickness, but usable drilling depth will still depend on the machine, stand travel, obstruction clearance and the need to remove the core during deep drilling.

Which Materials Are Actually Listed?

The current BAUMR-AG/Edisons product information lists the 152mm bit for:

• concrete;
• Poroton;
• cellular concrete;
• Ytong;
• marble;
• brick;
• tile;
• granite;
• stoneware; and
• other masonry and concrete surfaces.

This is a broad merchant suitability list. It does not mean every material should be drilled at the same speed, feed pressure or with the same cooling method.

Dense granite, brittle tile and concrete have very different cutting behaviour. Always consider both the bit and machine guidance for the actual substrate.

Reinforced Concrete: Do Not Assume Rebar Capability

The current 152mm bit listing says it is suitable for concrete, but it does not explicitly state that the bit is designed to cut reinforcing steel or rebar.

Some current BAUMR-AG core-drilling machines are themselves advertised for reinforced concrete. That proves the drill can be intended for that application when used with a suitable bit; it does not prove this exact TOLBITBMRA152 bit is rated to cut through steel reinforcement.

Firebusters recommendation: if the planned hole may intersect reinforcing steel, confirm the bit’s rebar suitability with the supplier before drilling. Do not rely on the word “concrete” alone.

1-1/4" UNC: Thread Compatibility Is Only Step One

The 1-1/4" UNC thread matches several current BAUMR-AG core-drilling machines. Examples include:

• 2000W 160mm handheld core drill with stand: 1-1/4" UNC spindle and a published maximum drilling diameter of 160mm;
• VC-200 3000W rig drill: 1-1/4" UNC spindle and up to 200mm published drilling capacity; and
• 3200W 300mm wet/dry core drill: 1-1/4" UNC spindle and a substantially larger published core capacity.

The first machine is particularly relevant because 152mm is close to its 160mm headline capacity. That means correct stand setup, workpiece conditions and operating technique matter.

A bit should only be used when the core-drill manufacturer permits the diameter and intended material. Do not fit this 152mm bit to an ordinary three-jaw drill chuck, impact driver or SDS drill merely through an improvised adaptor.

Read the Firebusters guide to the BAUMR-AG 2000W 160mm core drill →

No Bit-Specific Maximum RPM Published

The current product page does not publish a maximum RPM or recommended speed range for TOLBITBMRA152.

This matters because current compatible BAUMR-AG machines have very different spindle speeds. For example, current listings show approximately:

• up to 1900 RPM for the 2000W 160mm variable-speed drill;
• 1100 RPM for the VC-200; and
• 550 RPM for the 3200W 300mm wet/dry core drill.

Those are machine specifications, not an endorsed speed range for this exact bit.

Do not choose RPM by guesswork. Confirm the correct operating speed for the 152mm bit and target material from the supplier or current technical documentation before use.

Wet vs Dry Drilling

The merchant product title explicitly describes this 152mm bit as suitable for wet and dry use.

However, the current bit page does not publish a detailed wet/dry operating procedure or material-by-material limits. Firebusters therefore would not state that dry coring is equally appropriate for every listed substrate.

For concrete and other silica-containing masonry, wet drilling has an important health-control benefit because water can suppress dust at its source.

WorkSafe Victoria identifies on-tool water suppression and on-tool extraction as key controls for crystalline silica dust generated by drilling, cutting and similar work.

Silica Dust Is the Major Safety Issue

Concrete, brick, stone and many masonry products can contain crystalline silica. Drilling can release respirable crystalline silica dust that is small enough to penetrate deep into the lungs.

WorkSafe Victoria recommends effective engineering controls such as on-tool water suppression or on-tool dust extraction when drilling silica-containing material.

Suitable respiratory protection may also be required depending on the task and workplace risk assessment. For workplace use, PPE should support engineering controls rather than replace them.

Avoid relying on a basic household vacuum for hazardous silica dust. WorkSafe guidance refers to appropriate hazardous-dust extraction equipment and wet methods.

Managing Wet Slurry

Wet coring controls airborne dust, but it creates slurry containing fine concrete or stone particles.

WorkSafe Victoria warns that wet silica slurry can become a dust hazard again if it is allowed to dry and later becomes disturbed.

Plan before drilling:

• where water will run;
• how slurry will be contained;
• whether nearby electrical equipment can be affected;
• how walls, floors or finished surfaces will be protected; and
• how residue will be cleaned before it dries.

Low-pressure wet cleanup, appropriate slurry collection and suitable hazardous-dust vacuuming are preferable to sweeping dried residue into the air.

Large-Diameter Coring Needs a Stable Machine

A 152mm core bit creates a substantial contact area with the material. If it binds, the torque reaction can be significant.

A suitable rig or properly supported drilling machine can help control alignment and reaction force. Current BAUMR-AG core-drill listings include slip-clutch protection on several machines, but the user should still secure the rig correctly and maintain a stable operating position.

Do not improvise a large core-drilling setup with an ordinary hand drill. A compatible spindle does not replace adequate motor capacity, clutch protection, stand stability or safe anchoring.

Check for Hidden Services Before Drilling

A 152mm core hole is large enough to cause serious damage if it intersects concealed electrical cables, water pipes, gas services or structural elements.

Before drilling into an existing wall, slab or floor:

• review drawings where available;
• identify known service routes;
• use appropriate detection methods;
• inspect both sides of the proposed hole where possible; and
• stop if the substrate or service location is uncertain.

Large core drilling may also affect reinforcement or structural capacity. Structural questions should be assessed before cutting rather than after the core is removed.

Segment and Construction Details: What Is Known?

The current product listing publishes:

• 10mm cutting-teeth length;
• diamond/steel blend cutting material; and
• a steel core body.

It does not currently publish the number of diamond segments, individual segment width, diamond concentration, bond hardness or exact segment welding/brazing method.

Those missing details make it difficult to compare this bit technically with professional core bits from brands that publish full segment engineering data.

Firebusters therefore avoids claims such as “premium segment grade”, “laser welded” or “longest life” unless the manufacturer publishes evidence for this exact SKU.

Inspection Before Use

Before fitting the bit:

• inspect the steel barrel for distortion or cracking;
• check the diamond segments or cutting teeth for damage or missing material;
• make sure the 1-1/4" UNC thread is clean and undamaged;
• confirm the drill spindle is compatible;
• check the machine is isolated from power while fitting the bit; and
• confirm the planned drilling mode, speed and water/dust controls.

If a segment is cracked, loose or missing, do not continue using the bit.

152mm vs Smaller Core Bits

A 152mm hole may suit larger pipework, ventilation penetrations, service openings and other substantial building work. If the required penetration is only 50mm or 75mm, choosing the 152mm bit simply because the drill can accept it adds unnecessary material removal and load.

BAUMR-AG’s same family is currently offered in several smaller sizes, including 53mm, 63mm, 76mm, 102mm, 114mm and 127mm.

Choose the smallest diameter that meets the actual installation requirement and maintains necessary clearances.

Buyer Checklist

Firebusters Practical Recommendation

The BAUMR-AG 152mm bit is a specialist accessory for users who already have, or plan to buy, a proper core-drilling machine.

Its strongest verified points are straightforward: 152mm diameter, approximately 455mm overall length, 10mm diamond/steel cutting teeth, 1-1/4" UNC fitting and a 4.45kg product weight.

It also has a useful published masonry-material range, and the merchant describes it as wet/dry capable.

The main limitation is the lack of deeper technical data. The current bit listing does not publish a maximum RPM, full segment specification or explicit rebar-cutting approval. Those gaps matter more on a large 152mm bit than they would on a small general-purpose drill accessory.

Our recommendation: buy it when your core drill is specifically rated for a 152mm 1-1/4" UNC bit and the listed masonry application matches the job. For reinforced concrete, specialist trade work or situations where exact RPM and segment specification are critical, obtain written confirmation from the supplier before drilling.

Frequently Asked Questions

How long is the BAUMR-AG 152mm core bit?

Edisons’ current drill-bit range information states that BAUMR-AG core bits from 53mm through to 152mm are 455mm long.

What does the 10mm specification mean?

It is the published cutting-teeth length, not the overall core-bit length.

What thread does it use?

1-1/4" UNC.

Can it fit the BAUMR-AG 2000W 160mm core drill?

The current drill listing specifies a 1-1/4" UNC spindle and capacity up to 160mm, so the thread and headline diameter capacity align. The bit’s operating RPM and exact application should still be confirmed before use.

Can it be used wet and dry?

The current Edisons product title markets the bit for wet and dry use. The product page does not publish a detailed material-specific wet/dry procedure, so follow the machine instructions and appropriate silica controls.

Can it cut reinforced concrete?

The current bit listing says concrete but does not explicitly confirm rebar cutting. Some compatible drills are marketed for reinforced concrete, but that does not prove this exact bit is approved to cut reinforcing steel.

What is its maximum RPM?

A bit-specific maximum RPM is not published on the current product page. Confirm with the supplier rather than guessing from the drill’s speed.

What is the standard warranty?

Edisons currently shows a 12-month standard warranty, with optional Extended Care adding a further year under its terms.

Sources

• Edisons – BAUMR-AG 152mm Diamond Core Drill Bit
• BAUMR-AG – 152mm Diamond Core Drill Bit
• Edisons – BAUMR-AG 2000W 160mm Core Drill
• Edisons – BAUMR-AG VC-200 Core Drill
• Edisons – BAUMR-AG 3200W Wet/Dry Core Drill
• WorkSafe Victoria – Preventing Exposure to Crystalline Silica Dust
• WorkSafe Victoria – Safe Concrete Cutting and Drilling Industry Standard

Specifications, compatibility information and retailer terms can change. Information checked October 2026.