Diamond Core Bit Segment Profiles & Diamond Layouts: Flat, Turbo, Roof, Great Wall, Dotted Top & Ordered Array

Quick Answer: Specify Four Separate Layers

A professional diamond core bit specification should not treat every visible feature as a segment shape. We separate four layers: top profile, diamond arrangement inside the matrix, waterway design, and segment-to-barrel attachment. Keeping these fields separate lets a distributor compare samples without accepting a catalogue label that hides the actual construction.

The supplied profile reference shows four buyer-facing starting families: standard flat, turbo-grooved, crown/notched, and roof or tapered-wedge. They influence first contact, centering and face clearance. Bond, grit, concentration, segment width, machine power and cooling still determine whether the bit cuts productively.

Four Buyer-Facing Profile Families

Standard flat

A flat working face spreads load across the segment width and gives a predictable general-purpose starting point for wet coring. It is simple to inspect and easy to hold against a reference sample. It does not create a self-centering ridge, so machine alignment and start control remain important.

Turbo-grooved

Shallow grooves or ribs reduce the initial contact area and create local paths across the face. This can improve entry and face clearance, especially when the bond exposes diamond correctly. Turbo is not a substitute for a softer or harder bond selected for the actual aggregate.

Crown or notched

A crown profile breaks the top face into repeated contact zones. The geometry can make initial engagement more positive and create additional edges as the profile wears in. The RFQ should show the notch count, depth and reference photograph because suppliers use the word crown for several different mould geometries.

Roof or tapered wedge

A raised ridge or tapered face concentrates first contact near the centre of the segment. This is useful when controlled entry and rapid opening of the cutting face matter. The profile normally wears toward a flatter face, so performance after run-in still depends on the matrix and diamond layout.

Dotted Top, Great Wall and Market Profile Names

Dotted or dimpled top describes recesses or raised contact features on the visible working face. The feature can change initial contact area, coolant retention and face opening, but it does not prove that diamonds are positioned in an ordered three-dimensional array through the full segment depth.

Great Wall is a market name for a castellated or crenellated profile with repeated high and low contact zones. The exact tooth count, notch radius and depth are not standardized, so the signed drawing and side-profile photograph remain the real specification.

Supplier catalogues also use names such as normal, shallow-V, sawtooth, drum-tooth, aero and roof-and-net. These labels are useful for discussing a visual reference, but they are not a shared international geometry standard. Translate every catalogue name into a drawing, dimensions and an approved sample before production.

Profile Is Not Diamond Layout

Random, uniform and ARIX-style ordered diamond placement describe the distribution of crystals through the metal-bond matrix. They do not define whether the visible top is flat, turbo, crown or roof. An ordered-array segment can use any approved top profile that the mould and application require.

For a detailed comparison of diamond placement, use our ordered diamond array vs uniform distribution guide. In an OEM RFQ, write the top profile and the internal diamond layout on separate lines.

Waterways, Slots and Dimples

Inter-segment gaps, tube slots and surface dimples manage coolant arrival and slurry evacuation. A gap is the space between adjacent segments. A tube or crown slot creates a deeper flow path. A dimple is a local recess in the working face. Their value depends on diameter, depth, water supply and slurry volume; they are not universal upgrades.

Large or deep wet-coring programs may need more open flow paths, while smaller diameters can lose useful segment area if the crown is over-slotted. Confirm water flow and barrel geometry with the machine program instead of selecting a slot from appearance alone.

Attachment Is a Separate Decision

After a segment is hot-pressed and sintered, it still needs to be joined to the steel barrel. Laser welding, high-frequency induction brazing and silver brazing describe the joint route, not the segment profile. See our diamond core bit attachment methods guide for the correct two-axis specification.

Application Selection Matrix

OEM RFQ Wording

Diamond core bit Ø132 mm × 450 mm for wet reinforced-concrete coring. Segment top profile: approved crown/notched reference, drawing and photograph attached. Segment dimensions: length × width × total height stated on drawing. Diamond layout, grit, concentration and bond direction matched to the approved substrate and rig. Waterway: inter-segment gap and tube-slot dimensions stated separately. Segment-to-barrel joint: approved laser-welded or brazed route with sample acceptance. Production lot must match the signed reference sample.

This wording prevents a supplier from substituting diamond layout, waterway or joining method while claiming the visible profile is unchanged.

Zhonghuan View

We treat profile as one part of a complete cutting system. Send us the substrate, diameter, depth, rig, wet or dry mode, reinforcement condition and the profile reference you want to benchmark. We will return a proposed profile, matrix direction, waterway and joining route for engineering confirmation and sample approval.