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HP-10 3" D Crown Profile

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HP-10 3" D Crown Profile

Item Number: 1101-263-7

Availability: In Stock

Quick Overview

This profile, together with other sizes and hones, is also available as a "Works" package here.

$211.00

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Product Description

For those of you unfamiliar with crowned edges, it is an elegant alternative to square edges in your projects, (which work some times) but are often the hallmark of design compromises caused by working within existing capabilities. The use of crowned edges not only creates a sensuous edge, but by their nature, allows for the addition of shadows and depth which is almost always more visually interesting than planar surfaces. There is nothing sexy about a dead square edge in wood.

Crowned edges can be achieved on a router table, a spindle shaper, by scraping/filing, by spokeshave, or by hand with a crowning plane. Of all the options, the hand plane option with a crowned sole requires no further work (no sanding), and can be done without a dust mask or hearing protection. For these reasons, it is our favorite way to employ this design element.

The radius of the crown is determined by the ratio of the edge width /10 (give or take a little). The illustration below helps explain this ratio:


All of the irons for the HP-10 cut with the bevel up which is unusual for hand planed profiles. Because of this, it is ideal for crown planes to achieve their intended result by staying within a 60 degree cutting sector as illustrated below:


In the illustration below, you can see how a simple detail like a crowned edge can become a design theme as opposed to an add-on detail. When used as a theme, the elegant simplicity offers so much more to the viewer than flat edges and 90 degree corners, there is depth, there are shadows, the edges invite touch and it all adds up to visual interest – these things don’t happen by accident:


In this example, the crowned drawer pull cut-out was done by hand using the same ratios. If I were to add a pull to the drawer front instead of the cutout, it would most certainly reflect the theme of the crown.

What is interesting in this example, is that the horizontal and vertical members also shrink by 10% per occurrence. There is zero reason that the drawer shelf (90% the thickness of the carcase) should be as thick as the carcase and there is little reason to making the drawer divider (90% the thickness of the drawer shelf) the same thickness as the drawer shelf so three different crown diameters were used – even though it appears they are all the same. It is an important detail to have them look all the “same”, but what you are really seeing is an illusion, as the stock narrows, the diameter of the crown must shrink accordingly. What you see in this example is impossible with a single diameter. Lastly, the edge set-back is equal to the crown height for that particular piece, they too get narrower as the stock thins. This consistency is important.

The HP-10 is designed to work on stock up to 1-3/4" (44.5mm) thick and it is possible to to crown all thicknesses between 1-3/4"/44.5 mm down to 1/8" (3.2mm) with the following four crown diameters: 4.5" (114.3mm), 3" (76.2mm), 1.625" (41.3mm), and .5" (12.7mm).

Sharpening crowned irons is easy with our custom HP-10 Crown Hones.

The other aspect of the HP-10 we are going to change from our experiences over the last decade with the HP-6 is that there will be a single box for all four profiles and we will use this same box size for all profiles moving forward. This will allow you to either use the foam inserts to line custom drawers that YOU make (we are not going to make cabinets or storage chests) or simply stack the boxes for storage.

Crowned edges are clearly a beautiful option for casework, but will also work wonders on table legs, railings, and a host of other applications where you want your wood to feel and look sexy.

3" D Iron

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