Backout / Relief Cut Moulding 3-1/2"

This backout/relief cut moulding 3-1/2" measures 3.500" wide. This profile can literally be utilized on hundreds of our smaller sized baseboard, casing and chair rail mouldings. This design layout is comprised of a 2" wide by 1/16" deep plow, flanked by forty-five degree chamfers that transition into 3/4" wide straight lines on each side. The maximum width this knife can mill is 4-1/4" wide when the bottom moulder spindle is positioned at .000" axially.

To help better understand why these types of cuts are used in moulding manufacturing, please refer to our helpful article titled Moulding Backout Relief Cuts. After reading this commentary, we trust you will find the appropriate style design for your moulding profile.

For knife quoting purposes use the calculator below, we have added only the important measurements. A brief detailed explanation on how to use the calculator is located here. Need some assistance with the dimensions? Print a copy of our fraction - decimal - millimeter chart, place it on the moulder to help operators save time and increase accuracy during machine setup.

Width = 3.500" / Depth of Cut = .062" (bottom cutters).

Molding Knife Calculator

Moulding Size
(inches)

Depth of Cut
(inches)

Grade of Steel

V2+RW

V2+RW Rockwell Hardness about 58-62, Good Quality. Made for short runs, (1' - 1000') of high quality millwork. This steel is flash coated with a special hard chrome coating (.001") thick to help provide very long wear on the cutting edge. It will outlast any standard M-2 steel that's not coated. This steel is easy to grind with standard grinding wheels and borazon finish wheels. This steel is easy to joint on high speed machines.

To find out more about other different grades of knife steel please visit our summary page https://www.mr-moulding-knives.com/services/knives

chrome coated 72rc face, best seller, great tool life

Black Nitride

BLACK NITRIDE Rockwell Hardness about 70-72 (Surface Only), Premium Quality. Black Nitride (carbon nitride) steel offers longer run times than standard M2 or M3 high speed steel (1' - 2000'). Adding pure carbon to the top surface of the knife steel hardens the cutting edge about .010" to obtain about a 72 Rockwell. Steel is black oxide to reduce pitch build up and rust, this also gives the steel a uniform color due to the case hardening. Because the steel is case hardened and higher on the Rockwell scale this steel is more brittle than other non-case hardened steels. Excellent for stubborn hardwoods and softwoods, but not recommended for knotty woods or very large cuts over 1" depth of cut.

To find out more about other different grades of knife steel please visit our summary page https://www.mr-moulding-knives.com/services/knives

black nitride case hardened 72rc, medium size runs

Endurance

ENDURANCE Rockwell Hardness about 70-72 (Surface Only), Superior Quality. Endurance super run is the premium of all high speed knife steels. They start with V2 base, then apply P.V.D. (Physical Vapor Deposits) in an Ion sputtering magnetron chamber. These deposits consist of a five layer film of Aluminum, Chromium, Molybdenum, Nitride, and Titanium. This forms an extremely hard and heat resistant cutting edge twice as hard as C2 grade carbide. Because the coating is so thin, normal vitrified rough wheels and CBN finish wheels can be used on this product. Special care must be taken not to hone the face of the tool with anything but a block of wood. Tool life is increased up to 600 percent over normal high speed steel. Small amounts of MDF (500' or Less) can be run with this product.

To find out more about other different grades of knife steel please visit our summary page https://www.mr-moulding-knives.com/services/knives

chrome and diamond coated, longest tool life

Subtotal

$0.00

Custom Moulding Template

$40.00

Total
(Template & 2 Knives)

$0.00

Printable Fraction Decimal MM Chart

Back Print Purchase DXF

Note: If you’re experiencing trouble printing to Full Scale, Go to File, Print Preview. Change the “Shrink to Fit” option to 100%

To purchase this CAD generated, “template ready moulding dxf file”, please send $5.00 via PayPal.Me/MirrorReflections we will email you the precision drawing shortly after the payment is received.