Sterlco BP800 Series Granulators - Manual (Page 32)

800 Series beside-the-press Chapter 5: Maintenance 32 of 43
Specifications for Re-sharpening Rotor Knives
All the rotor knives must be re-sharpened in sets. Each knife within a set must
have a tolerance within 0.003" (0.05 mm) for the total height, heel to cutting
edge. Greater variations within a set will result in improper knife gap settings
and other operational problems. (See “Rotor Knife Specifications.”)
Knives below the minimum dimension specified must not be used! Using knives
below the specified minimum can cause interference resulting in serious damage
to the rotor and cutting chamber.
When using a surface grinder to re-sharpen the rotor or bed knives, it is not
harmful to allow a few small nicks to remain on the cutting edge. Grinding the
knife so that the cutting edge is free from all nicks can be wasteful.
Figure: Rotor Knife Specifications
.382” ± .003
(9.5 mm ± .05)
Minimum Length 2.305” (58.5 mm)
New Knife Length 2.480” (63 mm)
20°
30°