Design a diamond or CBN wheel

Why

A superabrasive wheel is a core carrying a thin abrasive section, so its cost is in the carats and the work, not in its size alone.

How

Open Design, choose the family and its shape, set the dimensions by their letters and read the checks, the carats and the price.

It opens in the workbench at /app/design/superabrasive-wheels.

Families

What you set

• Set Family first, then Shape. Together they decide which dimensions apply.
• Peripheral wheel shapes: 1A1, 1A1R, 1V1, 1F1, 3A1, 14A1, 14F1, 14V1. Cup wheel shapes: 6A2, 9A3, 11A2, 11V9, 12A2, 12V9. Electroplated shapes: 1A1, 1V1, 1F1, 14F1, 6A2, 11A2, 12A2.
• No family or shape fills the dimensions in for you. Every size comes from the request, because a wheel is made to its machine and its job.
• A value no source publishes opens at nothing: the hub, the inside flat, the relieved core, a bonded head's layer depth, the shank, the overhang, the mounting holes, the core material and how the section is fixed. Left empty, the tool is drawn without that feature and a warning says so.
• The design module writes the specification string and works out the carats of abrasive, the section volume, the plated area and the speed of rotation at the diameter.

What is checked

A block stops the design until the value it names is changed. A warning changes nothing and is said out loud.

Blocks

• A marked speed above the ceiling EN 13236 Table 6 gives for the core, the attachment and the bond on a machine that is not totally enclosed.
• Manual guidance above the speed EN 13236 gives it a safety factor for.
• A shape that cannot be made from its values: no core left, a section as wide as the hubbed wheel is thick, a face radius too small for the width, a cup with no depth, a wall or rim that reaches the bore, holes outside the core, a ball head no larger than its shank or an electroplated head below the smallest made.

Warnings

• A speed above the ceiling on a totally enclosed machine, where the maker must prove the safety factor against bursting. The burst test record is then priced under inspection.
• A speed that is not a step of the EN 13236 sequence. A core, attachment and bond the table does not provide for or cannot check.
• A feature left at nothing: the hub, the relieved core, the layer depth, the shank, the overhang, the holes or the core material. With no core material the core is left out of the price.
• A cup wall angle outside the band ISO 6104 gives its core number.
• Diamond on a ferrous workpiece, CBN on soft steel, a metal bond run dry, a small flange on a cut-off wheel, an unlisted single layer grit or a micro grit on CBN.

The speed ceilings are those of EN 13236 and the shape codes those of ISO 6104, both read in their public previews. Most other published figures are one maker's catalogue, Norton Winter's: a size outside it is accepted.

How it is priced

The abrasive is charged at your own grain row for its abrasive and grit where you hold one. The core is charged as the smallest core blank you hold that contains it. Otherwise each is charged at the design module's own rate.

What it produces

• Customer drawing
• Half section DXF
• Cutting list with the specification
• Spec sheet
• STEP, STL and GLB

Exports offers a customer drawing, a specification and quote PDF, a cutting list CSV, a DXF, an STL, a GLB and a STEP file.

From a wizard

The recommendation of the grinding wheel wizard opens here with its family, shape, abrasive, bond, grit and concentration set. Where it found a stock wheel, that wheel's sizes are set too.

It hands nothing over for a shape this design module does not draw.

What it does not make yet

The workbench and the specification sheet state its scope in these words: "This module sets out the core and the abrasive section of a wheel or a mounted point, writes its specification, counts the abrasive in carats and prices the manufacture. It checks the speed marked on a wheel against the ceilings of EN 13236 Table 6. It does not prove the safety factor against bursting, set the bore tolerance or run-out class, calculate the permitted speed of a mounted point or choose the marking: those stay with the wheel maker and the standards. It draws section shapes A, V and F only."

• Wheels with a section shape or a core form other than those listed under Shape.
• Core modifications other than plain holes and the relieved core of a cut-off wheel.
• Profile heads, burrs and routers, form wheels to a DXF and dressing tools.
• Feeds, infeeds and stock removal: the design module states no grinding data.

A bore tolerance, a run-out class, a balancing grade, the marking and the permitted speed of a mounted point are not values here. They go in the quote line's note word for word.