negative rake

negative rake

[′neg·əd·iv ′rāk]
(mechanical engineering)
The orientation of a cutting tool whose cutting edge lags the surface of the tooth face.
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The FE Series, says Perry, offers up to 70 per cent energy savings compared to conventional hydraulic machines, helped by a negative rake angle and five-point double toggle structure, which offers excellent motion performance, low energy consumption and high speed efficiency.
Because the angles of the file's corners were 60[degrees], the cutting edges formed in this fashion usually had a negative rake of 30[degrees].
Melamine should be cut with a negative rake saw and tooth spacing should not been more than 3/8 of an inch.
A positive or negative rake on the sear, in relation to the hammer hooks, will make the trigger pull very hard or introduce dreaded creep.
This is very important in the choice of cutting tool geometry, while a negative rake angle and cutting tool wear magnify hardened layer.
They included solid carbide end mills and a 1", 2-flute, negative rake indexable mill.
Created to machine hardened steels, it has a helix design, a heavy-duty core, and negative rake.
TP2500, available in an array of geometeries, including positive and negative rake angles and as a wiper, is the first grade created with the chemical vapor deposition (CVD) process.
Consequently, the force readings at such feed rates may not reflect the cutting mechanism correctly, and may lead to negative rake friction coefficients as shown in Figure 7.
But another option that will make cutting with your radial arm saw much easier and safer is to install a blade that has teeth with a zero or negative rake angle.
Some of the choices include negative rake inserts versus positive rake inserts and the combination Pos-Neg geometry inserts; coated versus uncoated, chip breaker styles and the different tool nose radius options.
The American Performance Series of inserts from American National Carbide, features negative rake turning inserts for use on modern CNC machines.

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