Moulding Knives by Mirror Reflections

Moulding Knives
by Mirror Reflections
(801)451-5987

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Back Out & Relief Cuts Moulding Catalog

A backout/relief cut is a shallow dado milled on the backside of wood moldings to help prevent cupping and warping. It can relieve any stress in milled lumber that may be case hardened due to improper drying techniques and allow airflow between surfaces while providing a good transition between framing and sheetrock when installed. A common practice is one-sixteenth to one-eighth of an inch in height for each three-quarter to one inch of thickness of milled wood. We prefer to use 45-degree angles in the transition areas. It will be easier to sharpen the knives when needed. The cutters will also benefit from longer milling times than backout/relief cut designs with transitions of greater angles. We have over two hundred styles of backout and relief cuts for door & window casings, baseboards, tongue & groove flooring, and door jambs. Backout knives are the most neglected cutters on the machinery. Inexperienced operators don't realize the finish problems dull knives can create from the abandonment of sharpening. When troubleshooting equipment problems, I always hear that "it's just a backout cutter." Listen to the machine; if your moulder is excessively loud or you're experiencing finish problems that look like chatter. The molder is begging you to sharpen the relief cut knives. You will experience intermittent indentations at the top of the profile while milling. What's happing is the blades are so dull that the lumber lifts off the bottom bedplates momentarily, walking over the knives instead of cutting thru the wood, creating finishing issues on the top of the lumber because of the proximity of both cutterheads. When searching for relief cut designs, please input width dimensions to narrow size preferences in the above search boxes, either a fraction of an inch or decimals. If you want a specific size backout, enter the minimum and maximum dimensions. If by chance you don't find a relief cut that works for your current application, just send us a sketch. We will design a new backout profile on cad, cut an acrylic template on our CNC machinery, and grind a set of cutters on our Weinig R 960 grinder, in any high-quality knife steel we offer.
224 BACKOUT/RELIEF CUTS PROFILES FOUND
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Template Ready
Downloadable DXF File
Backout/Relief Cut 4" - 3
Backout/Relief Cut 4" - 3
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Backout/Relief Cut 4" - 4
Backout/Relief Cut 4" - 4
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Backout/Relief Cut 4" - 5
Backout/Relief Cut 4" - 5
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Backout/Relief Cut 4" - 6
Backout/Relief Cut 4" - 6
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Backout/Relief Cut 4" - 7
Backout/Relief Cut 4" - 7
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Backout/Relief Cut 4" - 8
Backout/Relief Cut 4" - 8
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Backout/Relief Cut 4" - 9
Backout/Relief Cut 4" - 9
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Backout/Relief Cut 4-1/4"
Backout/Relief Cut 4-1/4"
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Backout/Relief Cut 4-1/4" - 1
Backout/Relief Cut 4-1/4" - 1
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Backout/Relief Cut 4-1/4" - 2
Backout/Relief Cut 4-1/4" - 2
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Back Out/Relief Cut 4-3/8"
Back Out/Relief Cut 4-3/8"
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Backout/Relief Cut 4-3/8" - 1
Backout/Relief Cut 4-3/8" - 1
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Backout/Relief Cut 4-1/2"
Backout/Relief Cut 4-1/2"
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Backout/Relief Cut 4-1/2" - 1
Backout/Relief Cut 4-1/2" - 1
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Backout/Relief Cut 4-1/2" - 2
Backout/Relief Cut 4-1/2" - 2
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Backout/Relief Cut 4-1/2" - 3
Backout/Relief Cut 4-1/2" - 3
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Backout/Relief Cut 4-1/2" - 4
Backout/Relief Cut 4-1/2" - 4
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Backout/Relief Cut 4-1/2" - 5
Backout/Relief Cut 4-1/2" - 5
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Backout/Relief Cut 4-1/2" - 6
Backout/Relief Cut 4-1/2" - 6
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Backout/Relief Cut 4-1/2" - 7
Backout/Relief Cut 4-1/2" - 7
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Backout/Relief Cut 4-1/2" - 8
Backout/Relief Cut 4-1/2" - 8
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Backout/Relief Cut 4-9/16"
Backout/Relief Cut 4-9/16"
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Backout/Relief Cut 4-9/16" - 1
Backout/Relief Cut 4-9/16" - 1
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Backout/Relief Cut 4-9/16"- 2
Backout/Relief Cut 4-9/16"- 2
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Backout/Relief Cut 4-5/8"
Backout/Relief Cut 4-5/8"
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Backout/Relief Cut  4-5/8" - 1
Backout/Relief Cut 4-5/8" - 1
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Downloadable DXF File
Backout/Relief Cut 4-3/4"
Backout/Relief Cut 4-3/4"
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Backout/Relief Cut 4-3/4" - 1
Backout/Relief Cut 4-3/4" - 1
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Backout/Relief Cut 4-3/4" - 2
Backout/Relief Cut 4-3/4" - 2
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Backout/Relief Cut 4-7/8"
Backout/Relief Cut 4-7/8"
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Backout/Relief Cut 4-7/8' - 1
Backout/Relief Cut 4-7/8' - 1
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Backout/Relief Cut 5"
Backout/Relief Cut 5"
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Backout/Relief Cut  5" - 1
Backout/Relief Cut 5" - 1
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Back Out/Relief Cut 5" - 2
Back Out/Relief Cut 5" - 2
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Backout/Relief Cut 5" - 3
Backout/Relief Cut 5" - 3
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Backout/Relief Cut 5" - 4
Backout/Relief Cut 5" - 4
click to view full scale & pricing options
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Backout/Relief Cut 5" - 5
Backout/Relief Cut 5" - 5
click to view full scale & pricing options
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Backout/Relief Cut 5" - 6
Backout/Relief Cut 5" - 6
click to view full scale & pricing options
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Backout/Relief Cut 5" - 7
Backout/Relief Cut 5" - 7
click to view full scale & pricing options
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Backout/Relief Cut 5" - 8
Backout/Relief Cut 5" - 8
click to view full scale & pricing options
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Backout/Relief Cut 5" - 9
Backout/Relief Cut 5" - 9
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut  5" - 10
Backout/Relief Cut 5" - 10
click to view full scale & pricing options
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Backout/Relief Cut 5" - 11
Backout/Relief Cut 5" - 11
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Downloadable DXF File
Backout/Relief Cut 5" - 12
Backout/Relief Cut 5" - 12
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Downloadable DXF File
Backout/Relief Cut 5-1/8"
Backout/Relief Cut 5-1/8"
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Downloadable DXF File
Backout/Relief Cut 5-1/8" - 1
Backout/Relief Cut 5-1/8" - 1
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-1/4"
Backout/Relief Cut 5-1/4"
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-1/4" - 1
Backout/Relief Cut 5-1/4" - 1
click to view full scale & pricing options
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Backout/Relief Cut 5-1/4" - 2
Backout/Relief Cut 5-1/4" - 2
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Backout/Relief Cut 5-1/4" - 3
Backout/Relief Cut 5-1/4" - 3
click to view full scale & pricing options
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Backout/Relief Cut 5-1/4" - 4
Backout/Relief Cut 5-1/4" - 4
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Backout/Relief Cut 5-1/4" –5
Backout/Relief Cut 5-1/4" –5
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-1/4" - 6
Backout/Relief Cut 5-1/4" - 6
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-3/8"
Backout/Relief Cut 5-3/8"
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-3/8" - 1
Backout/Relief Cut 5-3/8" - 1
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-3/8" - 2
Backout/Relief Cut 5-3/8" - 2
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-1/2"
Backout/Relief Cut 5-1/2"
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-1/2" - 1
Backout/Relief Cut 5-1/2" - 1
click to view full scale & pricing options
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Backout/Relief Cut 5-1/2" - 2
Backout/Relief Cut 5-1/2" - 2
click to view full scale & pricing options
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Backout/Relief Cut 5-1/2" - 3
Backout/Relief Cut 5-1/2" - 3
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-1/2" - 4
Backout/Relief Cut 5-1/2" - 4
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-1/2" - 5
Backout/Relief Cut 5-1/2" - 5
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut  5-1/2" - 6
Backout/Relief Cut 5-1/2" - 6
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-1/2" - 7
Backout/Relief Cut 5-1/2" - 7
click to view full scale & pricing options
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Downloadable DXF File
Backout/Relief Cut 5-5/8"
Backout/Relief Cut 5-5/8"
click to view full scale & pricing options
224 BACKOUT/RELIEF CUTS PROFILES FOUND
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Superior Quality Moulding Knives, Profile Templates & Tooling Since1997
Custom made in the USAMoulding Knives Made in the USA

Moulding Knives by Mirror Reflections

1588 South 250 East | Kaysville, Utah 84037

Phone/Fax: 801-451-5987 

Moulding Catalog Updated Saturday, March 2, 2024

© Copyright 1997 - 2024 Mirror Reflections Inc. All Rights Reserved.