1. Manufacturer of Heavy Duty High Precision
Drum Motors

2. Company Profile
• Modern manufacturing facilities in the US, Canada, and Holland
utilizing the latest technology and expertise.
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3. What Is a Drum Motor
The Van der Graaf Drum Motor is a one component
conveyor drive in which the motor, gear drive, and all
moving parts are enclosed inside the drum.
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4. Design Benefits
The Drum Motor Design:
Increases Reduces
o Versatility o Maintenance
o Space utilization o Downtime
o Durability o Noise
o Production o Energy &
o Safety Operating Costs
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5. Drum Motor Assembly
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6. Comparison to Conventional
The Drum Motor offers a much less complex and
more efficient way to power your belt conveyor.
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7. Comparison Video
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8. Savings Compared to Conventional
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9. Drum Motor Features
• Lubricant/Cooling
An oil bath ensures that heat is
transferred through the lubricant,
onto the drum, to dissipate on
the belt.
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10. Drum Motor Features
• Hermetic Sealing
Van der Graaf manufacturers
and engineers seals that are
specific to the industry to provide
a leak proof environment.
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11. Drum Motor Features
• Honed and Ground Gears
Using alloy steel, gears are
machined and honed to
AGMA/DIN6 standards and
exceed OSHA low-noise
requirements.
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12. Electric Motor
Supply Voltage
• Van der Graaf designs Drum Motors specific to each
environment.
• The drum motor can be supplied in all standard voltage or
any nonstandard voltage and frequency for three phase or
single phase applications.
General Torque Curve Graph
Vacuum Pressure Impregnation Process Video
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13. General Motor Torque Curve
This graph illustrates
the typical start-up
configuration and the
general motor torque
curves for Van der
Graaf drum motors.
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14. Vacuum Pressure Impregnation
(VPI)
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15. Lagging
• Urethane
Utilizes a unique ribbon flow method of
coating cylinders with high durometer
urethane.
• Hot Bond
A vulcanization process that adheres
colandered rubber to the exterior of a
drum motor shell. The result is a
seamless, durable, and tear resistant
finish.
• Ceramic
Rubber lagging with ceramic tiles
embedded improves traction and
abrasion resistance. Typically used for
larger HP drives that work in harsher
environments.
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16. Tungsten Carbide Infusion
• As an alternative to conventional lagging, Van der Graaf has
developed a traction coating layer of infused tungsten particles
embedded into the surface of the drum using a thermo spray
system.
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17. Range of Drum Motors
• Available in both standard material and stainless steel, Van der
Graaf Drum Motors can be used in all applications in order to
enhance any bulk or material handling system.
• Varieties include:
o Diameter Sizes
(4 – 36 inches)
o Various Belt Speeds
(3 ft/min – 1800 ft/min)
o Horsepower
(0.10 – 250)
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18. Sanitary Series Drum Motors
(SSV)
o Ideal for the food industry
o Essential to conveyors requiring
sanitary wash down
• SSV Labyrinth Sealing System
o Prevents contaminants from
penetrating the sealing integrity
of the unit.
o SSV drum motors are capable of
handling 2000psi wash down
pressure.
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19. Cross Drive
• This design has all the
benefits of the Drum
Motor combined with the
flexibility of an external
electric motor for quick
and easy installation.
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20. Extreme Duty
• The Extreme Duty Mining Series
Drum Motor is a robust unit for
mining applications able to
withstand heavy shock loads.
• Engineered for the harshest
environments.
Diameter: 20 – 36 inches
Horsepower: 50 – 250
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21. Industries
• The Van der Graaf Drum Motor is built to meet the requirements of
any application. Our industries include:
o Airport Baggage Handling
o Postal/Parcel
o Food
o Mining & Aggregate
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22. ROI Summary
• Reduced maintenance and downtime – only an oil change every 50,000 hours
• Enhanced space utilization – fit more lines into less floor or overhead space
• With 96% mechanical efficiency, power savings of over 30% are possible
• AGMA/DIN 6 gear standards reduce operating noise
• Enhanced operator safety by eliminating external moving parts
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23. Principle
Van der Graaf adheres to one principle:
“Design a superior product to meet
customer needs in a changing marketplace”
As a result VDG has been the premiere supplier of conveyor
belt drives for over 60 years worldwide and continues to
answer the demands of the material handling industry.
Thank You
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24. Menu
Title Tungsten Carbide
Company Profile Range of Drum Motors
What Is a Drum Motor SSV
Design Benefits Cross Drive
Extreme Duty
Comparison to Conventional
Industries
Savings
ROI Summary
Oil Lubricant VIDEO
Hermetic Sealing Comparison
VPI
Honed & Ground Gears
Lagging
Electric Motor
Tungsten Carbide
Torque Curve Cross Drive
Lagging Drum Motor Assembly