Gears All
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PHILLIPS KILN SERVICES LTD.
GEARS Identification of
Mechanical Problems & Symptoms
FLANGE-MOUNTED GEARS PRO • VERY SOLID DESIGN • EASY TO REVERSE IF IN GOOD CONDITION.
CON • NOT
VERY FORGIVING FOR THERMAL SPIKES • NOT EASY TO CORRECT FOR GEAR RUN-OUT PROBLEMS CAUSED BY SHELL DISTORTION
GIRTH GEAR
Machined mounting surface
Mounting bolt
SUPPORT GUSSET
GEAR FLANGE
SHIM SHELL
PRO
SPRING-MOUNTED GEARS
• ACCEPTS KILN SHELL THERMAL EXPANSION • EASILY REVERSED • CAN BE MOUNTED TO COMPENSATE FOR SOME SHELL RUN-OUT
CON • SPRING PLATES RETAIN MEMORY
REGULAR VISUAL INSPECTION
INSPECTION PORTS ARE IMPORTANT
BOSS HOLE AND PIN
DAILY / MONTHLY 1. 2. 3. 4. 5. 6. 7. 8.
Visual inspections Listen for unusual noises. Is kiln against uphill/downhill thrust roller. Condition of drive system? Welds, mounting & splice bolts? Tooth engagement/mesh Tooth profile wear Vibration?
GEAR Bottom land Top Land
Root Clearance
Pitch Diameter
Backlash Addendum
Root Circle Dedendum
Whole Depth
GEAR ELEMENTS
PINION
FALSE BOTTOMING
WORN RETAINERS
EXCESSIVE CLEARANCE GEAR OFFSET
a b c d e f
g IDEAL PATTERN
OPEN RING GEAR
RADIAL RUN-OUT
INCORRECT GEAR ASSEMBLY
WORN GEAR / NEW PINION
PRESSURE SPOT
GEAR WOBBLE
GEAR CONTACT PATTERNS
h i
DOWNHILL
PINION PATTERN
UPHILL
GEAR RUN-OUT
GEAR RUN-OUT FROM BENT SHELL
ANNUALLY 1. 2. 3. 4. 5.
Clean & measure amount of wear to teeth. Fix leaking seals. Check teeth for abnormal wear. Change gear lubrication. Clean bottom of gear guard.
AXIAL RUN-OUT
Gear Axial Run-out 0.100 0.090 0.080
Inches
0.070 0.060
Acceptable Operation New Installation (5 rpm or over)
0.050
New Installation (under 5 rpm)
0.040 0.030 0.020 0.010 0.000 6
8
10
12
14
16
18
20
22
24
26
28
30
32
Gear Pitch Diameter
Recommended run-out: 0.001”/foot pitch diameter
AXIAL RUN-OUT CALCULATION CHART LINE
STATION NUMBER
1
Left Indicator Readings "A"
2
Line 1, Signs Reversed
LINE
1
2
3
4
5
6
7
8
9
10
STATION NUMBER
3
Right Indicator Readings "B"
4
Algebraic Totals (Lines 2+3)
5
1/2 of Line 4 Totals (Axial Run-out)
Maximum Plus @
Maximum Minus @ Gear Outside Diameter
Total Run-out = Allowable Axial Run-out
11
12
RADIAL RUN-OUT
Gear Radial Run-out 0.140 0.120 0.100
Inches
Acceptable Operation
0.080 New Installation (5 rpm or over)
0.060 New Installation (under 5 rpm)
0.040 0.020 0.000 6
8
10 12 14 16 18 20 22 24 26 28 30 32
Gear Pitch Diameter Recommended run-out: 0.0015”/foot pitch diameter
GEARS Identification of
Mechanical Problems & Symptoms
FLANGE-MOUNTED GEARS PRO • VERY SOLID DESIGN • EASY TO REVERSE IF IN GOOD CONDITION.
CON • NOT
VERY FORGIVING FOR THERMAL SPIKES • NOT EASY TO CORRECT FOR GEAR RUN-OUT PROBLEMS CAUSED BY SHELL DISTORTION
GIRTH GEAR
Machined mounting surface
Mounting bolt
SUPPORT GUSSET
GEAR FLANGE
SHIM SHELL
PRO
SPRING-MOUNTED GEARS
• ACCEPTS KILN SHELL THERMAL EXPANSION • EASILY REVERSED • CAN BE MOUNTED TO COMPENSATE FOR SOME SHELL RUN-OUT
CON • SPRING PLATES RETAIN MEMORY
REGULAR VISUAL INSPECTION
INSPECTION PORTS ARE IMPORTANT
BOSS HOLE AND PIN
DAILY / MONTHLY 1. 2. 3. 4. 5. 6. 7. 8.
Visual inspections Listen for unusual noises. Is kiln against uphill/downhill thrust roller. Condition of drive system? Welds, mounting & splice bolts? Tooth engagement/mesh Tooth profile wear Vibration?
GEAR Bottom land Top Land
Root Clearance
Pitch Diameter
Backlash Addendum
Root Circle Dedendum
Whole Depth
GEAR ELEMENTS
PINION
FALSE BOTTOMING
WORN RETAINERS
EXCESSIVE CLEARANCE GEAR OFFSET
a b c d e f
g IDEAL PATTERN
OPEN RING GEAR
RADIAL RUN-OUT
INCORRECT GEAR ASSEMBLY
WORN GEAR / NEW PINION
PRESSURE SPOT
GEAR WOBBLE
GEAR CONTACT PATTERNS
h i
DOWNHILL
PINION PATTERN
UPHILL
GEAR RUN-OUT
GEAR RUN-OUT FROM BENT SHELL
ANNUALLY 1. 2. 3. 4. 5.
Clean & measure amount of wear to teeth. Fix leaking seals. Check teeth for abnormal wear. Change gear lubrication. Clean bottom of gear guard.
AXIAL RUN-OUT
Gear Axial Run-out 0.100 0.090 0.080
Inches
0.070 0.060
Acceptable Operation New Installation (5 rpm or over)
0.050
New Installation (under 5 rpm)
0.040 0.030 0.020 0.010 0.000 6
8
10
12
14
16
18
20
22
24
26
28
30
32
Gear Pitch Diameter
Recommended run-out: 0.001”/foot pitch diameter
AXIAL RUN-OUT CALCULATION CHART LINE
STATION NUMBER
1
Left Indicator Readings "A"
2
Line 1, Signs Reversed
LINE
1
2
3
4
5
6
7
8
9
10
STATION NUMBER
3
Right Indicator Readings "B"
4
Algebraic Totals (Lines 2+3)
5
1/2 of Line 4 Totals (Axial Run-out)
Maximum Plus @
Maximum Minus @ Gear Outside Diameter
Total Run-out = Allowable Axial Run-out
11
12
RADIAL RUN-OUT
Gear Radial Run-out 0.140 0.120 0.100
Inches
Acceptable Operation
0.080 New Installation (5 rpm or over)
0.060 New Installation (under 5 rpm)
0.040 0.020 0.000 6
8
10 12 14 16 18 20 22 24 26 28 30 32
Gear Pitch Diameter Recommended run-out: 0.0015”/foot pitch diameter
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