Distributor Training Session – Planetary Speed Reducers
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Torque vs. Speed
 Torque Multiplied
 Speed Reduced
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Chain & Sprocket Reduction
 Advantages
– Single Reduction is Common
Low Cost
– Common Components
 Disadvantages
–
–
–
–
Safety Concerns
Maintenance
Life Span
Space Requirements
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Offset Gear Reducer
Single & Multiple Reduction
High Ratios Available
Advantages
• Through Shaft Mount
• Readily Available
• Low Cost
Disadvantages
•
•
•
•
Not in Line
Reversal of Rotation
High Shaft Bearing Loads
Relatively Low Efficiency
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Worm Gear Reducer
High Ratios
Advantages
– Self-Locking
– Small Size
Disadvantages
– Very Low Efficiency
– Self-Locking
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AC Variable Speed Drive
 Inverter
 Vector
 Servo
 Advantages
– Price, no power unit
 Disadvantages
– Hazardous Environments
– Washdown Environment
– Bearing Loads
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Planetary Gear Reducer
Single, Multiple, and Compound
Reduction
High Ratios Available
Advantages
– High Efficiency
– Output Rotation Same as Input
Rotation
– Readily Available
– Low Cost per in.lb Torque
– Compact Size
– High Shaft Bearing Loads
– Balanced Design
Disadvantages
– Through Shaft Not Available
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Reasons to Sell Reducers
 Profitable
– Selling reducers is profitable
 Sell the Complete System
– When you work on the design and specifications, why let
someone else sell the reducer.
 Reducers Help Solve Application Problems
– The use of the HECO reducer can solve application
problems such a cogging, side load, high torque
requirements, and space limitations
 Offer Customers a Single Product Source
– If your customer has to look to someone else to supply
products, you open the door to competition.
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Model 16 Single Reduction
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Model 20 Single Reduction
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Model 20D Double Reduction
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Model 50 Single Reduction
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Model 50D Double Reduction
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Model 52D Double Reduction
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Model 52T Triple Reduction
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LSHT Hydraulic Motor Input
 Low Speed – High Torque (LSHT)
 Single Stage Reduction and LSHT Motor Delivers
Efficient Low Speed – High Torque Output
 Wide Variety of Motor Displacements and
Efficiencies to Suit Application
 Low Motor Cost
 Bearingless Motors Available
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LSHT Hydraulic Motor Example
2000 Series
Eaton Motor
(in3/rev)
Equivalent
Motor Size
(in3/rev)
Torque
(in.lbs)
Pressure
(psi)
4.9
25.4
10,586
3000
6.2
32.2
13,577
3000
41.6
17,720
3000
49.9
20,942
3000
61.9
24,854
3000
14.9
77.5
22,093
2000
18.7
97.2
26,695
2000
24.0
124.8
27,439
1750
8.0
9.6
11.9
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Model 16
Reducer
times
5.2:1
ratio
LSHT Motor vs. High Speed Motor
LSHT Motor
– Single Reduction
– Low Speed, Single
Reduction Keeps Heat Low
and Efficiency High
– LSHT Motors are Usually
Low Cost
– Single Reduction and LSHT
Motor Equals Efficiency of
High Speed Motor with
Double Reduction
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High Speed Motor
– Multiple Reduction
– High Speeds and Complex
Gearing Develop More Heat
and Efficiency Loss through
Multiple Reductions
– High Speed Motors are
Usually Expensive
– High Speed Motor is More
Efficient, Double Reduction
Reduces Efficiency
Heco’s Primary Competition
HECO with Hydraulic Motor
– Inherently Variable Speed
– Small Package at Point of Use
– Control of Acceleration to
Maximize Component Life and
Minimize Horsepower
– Can be Used in Hostile
Environments with No Special
Precautions
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Electric Motor Gearbox
– Complex and Expensive Speed
Variation
– Large Total Package Size at
Point of Use
– Electric Motor Requires High
Horsepower to go from Zero to
Full RPM in a Short Time
– Special Motor Required for Wet
or Explosive Environments
Cost Comparison
Model 16 with Bearingless Motor vs 10,000 Series Eaton
Eaton 2000
Cu.in/rev List-Price
Eaton 2000
with Heco 16
Cu.in/rev List-Price
Eaton 10,000
Cu.in/rev List-Price
4.9
$323
25.48
$1,228
20.65
$1,621
32%
6.2
$328
32.24
$1,233
29.22
$1,649
34%
8.0
$331
41.6
$1,236
40.55
$1,685
36%
11.90
$342
$1,247
57.36
$1,742
40%
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61.88
Electronics – RE Magnetic Pickups
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Electronics - Features & Benefits
 Enclosed Pick-up Point
– Eliminates false signals and clogged signal points
 Integral Mounting
– Eliminates the need for belt drives and sprockets
 Self Powered
– Eliminates the need to run power to tach generation in many
applications
 Signal Amplifier Available
– Amplifier available for low speed or high resolution applications
 Adjustable Time Base
– Allows direct readout in units of customers choosing
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Electronics – Application Ideas
RPM Measurement
RPM Control and Feedback
Product Counting with Data Acquisition
Acceleration and Deceleration Ramp Control with
Feedback
 Verification of Operation




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Lubrication Instructions



Unit must be filled with proper type and amount of lubrication before
startup
Fill to ½ capacity for horizontal operation
Maximum oil temperature – 140oF continuous, 170oF intermittent
Single
Double
RPM Out RPM Out AGMA
ISO
SAE
0-25
5
220
90
3
100
80W
0-40
25-100
100-200
40-80
1
46
75W
200+
80+
consult
consult
consult
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Sizing a Motor and Gear Reducer
 Determine:
– Required Torque
– Required Output Speed
– Available System Pressure
Example:
– 33,000 in.lb. Output torque
– 40 RPM output
– 2,500 PSI available
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Sizing a Motor and Gear Reducer
 Calculate Total Displacement
– Total Displacement = (torque * 2 pi) / pressure
– Total Displacement = (33,000 * 6.28) / 2500
– Total Displacement = 82.9 in3/Rev.
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Sizing a Motor and Gear Reducer
 Calculate Flow Required
–
–
–
–
Flow = (In3/Rev * Rev/Min) / In3/Gal
Flow = (82.9 * 40) / 231
Flow = 14.35 Gal Theoretical
Assume 85% Volumetric Efficiency 14.35 / .85 = 16.88 Gal
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Sizing a Motor and Gear Reducer
 Select Motor
–
–
–
–
–
Total Displacement / Gear Ratio = Motor Displacement
82.9 / 4.8 = 17.27 in3/Rev
82.9 / 6 = 13.82 in3/Rev
82.9 / 24.96 = 3.32 in3/Rev
82.9 / 31.2 = 2.66 in3/Rev
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Sizing a Motor and Gear Reducer
 Select Motor
– Assume 90% mechanical efficiency of the motor and gear
box combination and the displacements would become:
– 17.27 = 19.2
– 13.82 = 15.35
– 3.32 = 3.69
– 2.66 = 2.95
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Sizing a Motor and Gear Reducer
 Single or Double Reduction
– 40 RPM * 24.98:1 or 31.2:1 would result in motor speeds at
or in excess of 1,000 RPM – beyond the range of most LSHT
motors and at the low efficiency end of the high speed
motor range.
– 40 RPM * 4.8:1 or 6:1 would require motor speeds of 240
RPM and 192 RPM respectively which is in the best operating
range of most LSHT Gerotor type motors
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Sizing a Motor and Gear Reducer
 Sizing Summary
–
–
–
–
–
Select a Model 20 Single Reduction
with a 6:1 Ratio
and use a 19 in3/Rev (approx.) LSHT motor
that is rated for 17 GPM
and 2500 PSI.
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Competition Auburn
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Competition Fairfield
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Heco Product Differentiation






Continuous Torque Rating
Ductile Iron Castings
High Pressure Case Seals
Removable Seal Carrier
Planet Bearing Design
Shaft Bearing Design
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Bearing Pre-Load
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Heco’s Hydraulic Torque Wrench
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Bearing Pre-Load vs. Bearing Life
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Planet Bearing
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Installation Drawings
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Installation Drawings
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Heco Packaged Drives
 Custom Power Unit Sized for
Your Application Requirement
 Design Specifications, Pricing
Configurator, and Installation
Drawings Online
 2-4 Week Lead-time for
Standard Configuration
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Heco Success Factors
 Distribution Background – Understand, Respect, and
Support the Value Distributors Provide
 Priced for High Distributor Margins
 Customer Application Focus
 Solution Oriented – Customized Products
 Inventory Investment – Keep Lead-times Short
 Responsive – Production Flexibility for Quick
Shipments
 Technology – Web Site Self-Service Tools
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Web Site – www.hecogear.com
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