Best practices for Milling and Profiling

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Monday, March 11, 13

What is Milling or Cold Planing?

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What is Milling or Cold Planing?Milling or Cold Planing is the controlled

cold milling of pavement to restore the surface to a specified profile. Bumps, ruts, and other surface irregularities are removed, leaving a uniform textured surface.

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Why is it needed?

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Why is it needed?

BEFORE

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Why is it needed?

BEFORE

AFTER

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3 KEY POINTS ON "MILLING SPECIFICATIONS"

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3 KEY POINTS ON "MILLING SPECIFICATIONS"

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Pattern

3 KEY POINTS ON "MILLING SPECIFICATIONS"

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PatternCross Slope

3 KEY POINTS ON "MILLING SPECIFICATIONS"

Monday, March 11, 13

PatternCross Slope

Longitudinal Smoothness

3 KEY POINTS ON "MILLING SPECIFICATIONS"

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What For?STANDARD MILLING

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-Removal of the existing pavement -to the desired depth

What For?STANDARD MILLING

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-To restore the pavement surface -to the specified grade and slope

-Removal of the existing pavement -to the desired depth

What For?STANDARD MILLING

Monday, March 11, 13

-To restore the pavement surface -to the specified grade and slope

-Removal of the existing pavement -to the desired depth

-To help improve the ride-ability -of an existing surface

What For?STANDARD MILLING

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What Equipment is needed for the job?

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What Equipment is needed for the job?

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What Equipment is needed for the job?

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What type of automatics are needed for the job?

Wire-rope sensor

Slope sensor Ultrasonic sensor

Sonic Skisensor

Rotary angle sensor

Laser sensor

3D sensor

Cylinder sensor

Control panel

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Questions that need to be answered:What is the depth at which is to be cut?What is the area in which needs to be cut?How many trucks to we have?Is there water source on site?ARE THERE ANY OBSTRUCTIONS?

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Monday, March 11, 13

Zero point

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Starting off

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Starting off

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Loading of trucks hauling the RAP.

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STANDARD CUTTING PATTERNTRIPLE WRAP5/8” SPACING

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52 FPM 26 FPM

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131 FPM 66 FPM

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131 FPM

52 FPM

26 FPM

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Slow speed

Standard pattern

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CUTTER DRUMcomponents

LOOSE BEARING EQUALS A ROUGH GRADE

DOOR PRESSURE

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HOLDER VARIETY

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5 DEGREE SKEW

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Problems (High speed)

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What controls a good Cutter pattern ?In summary

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• Overall condition of the machineWhat controls a good Cutter pattern ?

In summary

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• Overall condition of the machine• Track pad condition

What controls a good Cutter pattern ?In summary

Monday, March 11, 13

• Overall condition of the machine• Track pad condition

What controls a good Cutter pattern ?In summary

Monday, March 11, 13

• Overall condition of the machine• Track pad condition

What controls a good Cutter pattern ?In summary

Monday, March 11, 13

• Overall condition of the machine• Track pad condition• Cutter drum condition and tooth

spacing

What controls a good Cutter pattern ?In summary

Monday, March 11, 13

• Overall condition of the machine• Track pad condition• Cutter drum condition and tooth

spacing• Cutter drum tooth holder condition

What controls a good Cutter pattern ?In summary

Monday, March 11, 13

• Overall condition of the machine• Track pad condition• Cutter drum condition and tooth

spacing• Cutter drum tooth holder condition• Cutter rotation speed

What controls a good Cutter pattern ?In summary

Monday, March 11, 13

• Overall condition of the machine• Track pad condition• Cutter drum condition and tooth

spacing• Cutter drum tooth holder condition• Cutter rotation speed• Cutter wrap

What controls a good Cutter pattern ?In summary

Monday, March 11, 13

• Overall condition of the machine• Track pad condition• Cutter drum condition and tooth

spacing• Cutter drum tooth holder condition• Cutter rotation speed• Cutter wrap • Grade control system

What controls a good Cutter pattern ?In summary

Monday, March 11, 13

• Overall condition of the machine• Track pad condition• Cutter drum condition and tooth

spacing• Cutter drum tooth holder condition• Cutter rotation speed• Cutter wrap • Grade control system• Pavement condition

What controls a good Cutter pattern ?In summary

Monday, March 11, 13

• Overall condition of the machine• Track pad condition• Cutter drum condition and tooth

spacing• Cutter drum tooth holder condition• Cutter rotation speed• Cutter wrap • Grade control system• Pavement condition• Ground speed

What controls a good Cutter pattern ?In summary

Monday, March 11, 13

• Overall condition of the machine• Track pad condition• Cutter drum condition and tooth

spacing• Cutter drum tooth holder condition• Cutter rotation speed• Cutter wrap • Grade control system• Pavement condition• Ground speed• Water for dust control and tooth

rotation

What controls a good Cutter pattern ?In summary

Monday, March 11, 13

• Overall condition of the machine• Track pad condition• Cutter drum condition and tooth

spacing• Cutter drum tooth holder condition• Cutter rotation speed• Cutter wrap • Grade control system• Pavement condition• Ground speed• Water for dust control and tooth

rotation• GOOD CREW!!!

What controls a good Cutter pattern ?In summary

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Fine milling

5/8” 5/16”

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1 cutting tool per cutting line 2 cutting tools per cutting line

With 1 rotation of the milling drum, 1 cutting tool cuts per each cutting line.

With 1 rotation of the milling drum,2 cutting tools are cutting per each cutting line.

20 m/min 20 m/min

¼ in ¼ in x 2

65.6 FPM65.6 FPM

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Monday, March 11, 13

Daily Maintenance

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Daily Maintenance

Cleaning of machine.

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Daily Maintenance

Cleaning of machine.

Lubrication of machine.

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Daily Maintenance

Cleaning of machine.

Lubrication of machine.

Tool changing.

Monday, March 11, 13

Daily Maintenance

Cleaning of machine.

Lubrication of machine.

Tool changing.Check for leaks and repair accordingly.

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Review:

* Know the job details.* Know what equipment is needed to perform job.* Know in what manner to operate equipment, and achieve quality desired.* Preventive and daily maintenance.* And most of all….

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Always work safe!

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Thank you!

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