RM Series 3-Roll Mill

RM Series Three Roll Mills


Product Description

RM Series Roll Mills are suitable for soap refining and can also be adapted for pigment grinding and color dispersion.  All product-contacted parts are made of stainless steel. There is a choice of stainless steel or hardened steel rolls. Water cooling is through a sealed system with rotary joints. The main drive is through gears which require minimal lubrication. The machine is also available as an RM-4L with an extended roll length.


Models RM-4 RM-4L RM-2.5
Roll Diameter 4″ 4″ 2.5″
Roll Length 8″ 12″ 5″
HP 2 3 1/2
Drive Gears/
Lube-Free Chain
Lube-Free Chain
Lube-Free Chain
Controls Electronic Electronic Electronic
Dimensions H x W x D 22″ x 28″ x 16″ 22″ x 32″ x 16″ 20″ x 11 ” x 18″
Weight 370 lbs. 410 lbs. 190 lbs.

The RM-4 and RM 4-L are for soap processing applications. For pigments, the designations are RM 4-P, RM 4L-P with power requirements changing to 1 HP and 2 HP, respectively.

Sigma RM-4 Three Roll Mill Features

Model RM-4

  • Variable speed drive
  • Quiet operation due to non-metallic gears and Lube-free chain.
  • Splash-proof controls
  • Solid state electrical drive
  • Sealed water cooling
  • Safety cover shields turning rolls (models RM-4 and RM-4L only)
  • Compliant with ANSI B65
Sigma RM-2.5 Three Roll Mill Features

Model RM-2.5

  • Quiet operation due to Non-metallic Gears and Timing Belt
  • Splash-proof Controls
  • Solid state electronic drive
  • Water cooled rolls
  • Compliant with ANSI 65
  • Run-Wash modes