Pelletizer

Question 1

How do you check the Alignment from the carriage to the Die Plate? How do you make adjustments?

Answer 1

Roll the carriage towards the die without the Waterbox O-Ring Installed. Check the Clearance with Filler Guages. Max is .040”

Make adjustments by placing shims betweeen the bearing housing and flexible rubber members.

Question 2

The total clearance between the blades and die face should be no less than _____ and no greater than _______. If necessary, how should you make adjustments.

Answer 2

The total clearance between the blades and die face should be no less than .030” and no greater than .040”

The procedure mentions to make adjustments by adding shims behind the hub(what we have done in the past). Instead, we should make these adjustments using the jack bolts behind the hub.

Question 3

How do you determine the total clearance between the blades and die face?

Answer 3

1. Put Straight Edge across the Die, then measure how far Die Face is Countersunk from the Edge of Die. If the Die is flat, this value should be 0
2. Lay a straight edge across the face of the waterbox while fully retracted(furthest away from die), then measure the distance from straight edge to the blades using a feeler guage or dial indicator.
3. Add these values together, and this gives us our total clearance between the blades and die face.

Question 4

How do you determine Axial Runout of Die Face?

Answer 4

Install dial indicator on shaft and sweep the die in a full circle. Measure the scribe in each location to ensure it’s all within .040”

Question 5

Axial Forces

Answer 5

• Axial is a Direction like “Which Way?” This refers to a direction or force along the axis of rotation

Question 6

Thrust Forces

Answer 6

• Thrust is like a force like “What’s causing the movement in that direction? Ex. Engine” Thrust is a specific type of axial force that is associated with propulsion or pushing/pulling an object along the axis.
• Thrust cannot be measured as a distance but rather a “Force”

Question 7

Radial Forces

Answer 7

Side Forces; perpendicular to the axis of rotation

Question 8

What is Radial Bearing Play? How do you collect this by hand force?

Answer 8

• Radial play is the total movement possible between the inner and outer rings of a bearing when no axial (along the axis) load is applied.
• It describes the gap between the rolling elements (balls or rollers) and the raceways (inner and outer rings).
• Lifting up and down.

Question 9

What is Thrust Bearing Play? How do you collect this by hand force?

Answer 9

• Definition: The total amount of clearance or movement in a bearing when a force is applied along the axis of rotation (in the axial direction).
  *
  
  • Direction of Force: Back-and-forth movement along the shaft’s axis (imagine pressing or pulling the shaft straight in or out).

Question 10

What is Axial Runout of Shaft Shoulder? How is it collected?

Answer 10

Deviation or wobble of the face of the shaft shoulder from being perfectly perpendicular to the shaft’s axis of rotation.

0 out a Dial Indicator on the shaft shoulder then rotate and observe the change in value. The axial runout is the difference between the maximum and minimum readings on the dial indicator.
* Example: If the highest reading is +0.05 mm and the lowest is -0.03 mm, the axial runout is 0.05 - (-0.03) = 0.08mm

Question 11

What is the Axial vs. Radial runout analogy for a Pizza.

Answer 11

Imagine a spinning pizza:
1. Axial Runout: The pizza is wobbling up and down like a plate on a poorly balanced table—measured along the axis.
2. Radial Runout: The pizza’s edge isn’t perfectly circular, and it moves side-to-side as it spins—measured perpendicular to the axis.

Question 12

What is Axial Runout

Answer 12

• Definition: Axial runout is the wobble or deviation of a surface that is supposed to be perpendicular to the rotational axis.
  • How It Happens: If the shoulder face or flange is not perfectly flat or square to the axis, it will move in and out (axially) as the shaft rotates.