light power & precision light power & precision light power & precision

112 Pages·2014·4 MB·English

LIGHT POWER
& PRECISION
DRIVE DESIGN MANUAL
Table of Contents
NOTE: Click on the desired item or page number to jump directly to that page.
Introduction to Gates Products ........................................................................................................................................................ 1 - 7
Drive Comparison Graphs ....................................................................................................................................................................... 8
Synchronous Drive Comparisons ....................................................................................................................................................9 - 11
PowerGrip® GT®3, HTD®, and Timing Belt Drive Selection Procedure - Single Sided ....................................................................... 12
PowerGrip® GT®3 Belt Drives - Single Sided .................................................................................................................................13 - 21
Belt Lengths and Widths ..........................................................................................................................................................15 - 16
Pitch Selection Guide ...................................................................................................................................................................... 17
Belt Width Selection / Torque and Power Ratings .....................................................................................................................18 - 21
PowerGrip® GT®2 Belt Drives - Twin Power ................................................................................................................................. 22 - 28
Belt Lengths and Widths ................................................................................................................................................................. 23
Drive Selection Procedure ............................................................................................................................................................... 24
Pitch Selection Guide ...................................................................................................................................................................... 25
Belt Width Selection / Torque and Power Ratings .................................................................................................................... 26 - 28
5M PowerGrip® GT®2 Sprocket Information ................................................................................................................................. 29 - 37
PowerGrip® HTD® Belt Drives ........................................................................................................................................................ 38 - 49
Belt Lengths and Widths - Single Sided .................................................................................................................................. 39 - 40
Pitch Selection Guide ...................................................................................................................................................................... 41
Belt Width Selection / Torque Ratings - Single Sided & Twin Power ........................................................................................ 42 - 43
Twin Power Belt Drives ....................................................................................................................................................................44
Belt Lengths and Widths - Twin Power ............................................................................................................................................45
Sprocket Information ............................................................................................................................................................... 46 - 49
PowerGrip® Timing Belt Drives ..................................................................................................................................................... 50 - 58
Belt Lengths and Widths - Single Sided .................................................................................................................................. 51 - 52
Pitch Selection Guide ......................................................................................................................................................................53
Belt Width Selection / Torque Ratings - Single Sided & Twin Power ................................................................................................54
Twin Power Belt Drives .................................................................................................................................................................... 55
Belt Lengths and Widths - Twin Power ............................................................................................................................................56
Pulley Information .................................................................................................................................................................... 57 - 58
PowerGrip® Long Length Belting .......................................................................................................................................................... 59
Synchronous Belt Drive Engineering ............................................................................................................................................ 60 - 79
Belt Tensioning ........................................................................................................................................................................ 64 - 66
Synchronous Belt Specifications ..................................................................................................................................................... 72
Synchronous Sprocket Specifications ...................................................................................................................................... 73 - 79
Polyflex® JB® Belt Drives ............................................................................................................................................................... 80 - 82
Micro-V® Belt Drives ...................................................................................................................................................................... 83 - 84
Polyflex® and Micro-V® Drive Selection Procedures ................................................................................................................... 85 - 90
Polyflex® JB® Power Ratings ................................................................................................................................................... 88 - 89
Micro-V® Power Ratings ..................................................................................................................................................................90
Polyflex® and Micro-V® Belt Drive Engineering ......................................................................................................................... 91 - 102
Belt Tensioning ........................................................................................................................................................................ 93 - 94
Polyflex® Sheave Groove Specifications ........................................................................................................................................... 98
Micro-V® Pulley Groove Specifications .............................................................................................................................................99
Belt Pull and Bearing Loads .................................................................................................................................................100 - 101
Belt Storage and Handling ............................................................................................................................................................. 102
Useful Formulas and Calculations .............................................................................................................................................103 - 108
® www.gates.com/drivedesign
®
Introduction
Gates belt drive systems offer more Gates continually makes strides in specialized
research, product development, testing and Continuous engineering support is available
advantages at lower cost than other overnight availability of products. The team of your for complex drive layouts including hardware
design engineers and Gates application engineers design and specifications.
methods of motion transfer or assures an efficient, low-cost and quality
drive system.
power transmission. MADE-TO-ORDER METALS
[phone]
Total quality support
The popularity of Gates drive systems
Gates offers professional support from conceptual
CUSTOMER SERVICE
can be attributed to our commitment design to delivery of the finished product. We make
[phone]
sure you…
to customer satisfaction and quality.
• u se the best product for the application
PRODUCT APPLICATION ENGINEERING
• m inimize drive package size and cost
[phone]
• minimize testing time using our experience
[phone] fax
® ®
Introduction – PowerGrip GT 3 Belt Drives
PowerGrip® GT®3 Belts are an HTD was developed for high torque drive
advanced design of Gates HTD® applications, but is not acceptable for most
system and feature: precision indexing or registration applications.
The HTD design requires substantial belt tooth to
• a modified curvilinear belt tooth profile with
sprocket groove clearance (backlash) to perform.
mating sprocket groove.
As smaller diameter sprockets are used, the
• r egistration and indexing accuracy equivalent to clearance required to operate properly is increased.
the conventional PowerGrip Timing Belt System. HTD drive clearance, using small diameter
PowerGrip® GT® 3 Belt • a higher load-carrying capacity and longer belt sprockets, is approximately four times greater than
Tooth/Groove Contact
life than either PowerGrip HTD or Timing belts. an equivalent timing belt drive.
It’s difficult to make a true quantitative comparison
between the backlash of a trapezoidal tooth The PowerGrip® GT®3 deep tooth profile
drive and PowerGrip® GT®3 tooth drive due to provides…
the difference in “sprocket to belt tooth” fit. (See
• i ncreased contact area and improves resistance
illustrations at left). Trapezoidal belts contact the
to ratcheting.
sprocket in the root radius — upper flank area
only, while the PowerGrip® GT®3 system permits • e asy, clean entering and exiting the sprocket
full flank contact. grooves…resulting in reduced vibration.
• p arallel contact with the groove and eliminates
PowerGrip® HTD® Belt stress concentrations and tooth deformation
The main stress line in a trapezoidal tooth timing
Tooth/Groove Contact under load.
belt is at the tooth base. During operation stress
greatly reduces belt life. The PowerGrip® GT®3 • i mproved registration characteristics and
system overcomes this with complete tooth flank maintains high torque carrying capability.
contact…which eliminates the tooth stress line
area. This greatly increases belt life and prevents
tooth distortion caused by drive torque. In addition,
the conventional timing belt has a chordal effect
as it wraps small sprockets. This is significantly
reduced in the PowerGrip® GT®3 system due to
full tooth support along the sprocket. Full support
PowerGrip® Timing Belt improves meshing, reduces vibration and minimizes
Tooth/Groove Contact tooth deformation.
On drives using a low installation tension, small
pulleys, and light loads, the backlash of the
PowerGrip® GT®3 system will be slightly better than
the trapezoidal timing belt system. However, with
increased tension and/or loads and/or sprocket
sizes, the performance of the PowerGrip® GT®3
system becomes significantly better than the
trapezoidal timing belt system.
2 ® www.gates.comd/ rivedesign
®
® ®
Introduction – PowerGrip GT 3 Belt Drives
This PowerGrip® GT®3 synchronous belt When precision is critical, depend on
fits in tight, hard to fit applications with PowerGrip®GT®3 belts
room to spare.
PowerGrip® GT®3 belts are designed for precision 2MGT
applications. Custom-built constructions are
Lasts longer than competitive belts available for applications requiring maximum 3MGT
performance. Worldwide manufacturing
PowerGrip® GT®3 belts outlast the competition in capabilities assure you of prompt service for
these ways: important markets. 5MGT
• D eep tooth profile provides superior load- PowerGrip® GT® 3 belts are available in 2mm,
carrying strength and reduces ratcheting 3mm and 5mm pitches. Larger 8mm and 14mm
when using Gates sprockets. pitch belts are also available. See Catalog 17195 - PowerGrip® GT®3 Belt
• A durable nylon fabric tooth covering PowerGrip® GT® 3 Belt Drive Design Manual. Profiles/Pitches
increases tooth strength and provides wear
and abrasion resistance.
Here are some of the many PowerGrip®
• F iberglass tensile cords wrapped in a durable GT®3 belt applications:
neoprene body provide flexibility and increase
• data storage equipment
service life.
• machine tools
• hand power tools
Precision registration
PowerGrip® GT®3 belts provide timing and • postage handling equipment
synchronization accuracy for flawless registration, • DC stepper/servo applications
with no loss of torque carrying capability. • food processors
• centrifuges
Increases load-carrying capacity • printers
Load capacities exceed HTD and trapezoidal • floor care equipment
belt capabilities…making PowerGrip® GT®3 the
• money handling equipment
choice for accurate registration, heavy loads and
small sprockets. Smaller and tougher than HTD • medical diagnostic equipment
or trapezoidal belts, PowerGrip® GT®3 belts give
• sewing machines
engineers more space-saving flexibility for
micro-technology. • automated teller machines
• ticket dispensers
Sounds this quiet … • ploters
PowerGrip® GT®3 belt’s specially engineered teeth • copiers
reduce noise and vibration. Clean meshing and • robotics equipment
reduced belt width results in noise reduction when
• vending equipment
compared to PowerGrip Timing and HTD belts.
• v acuum cleaners
• office equipment
PowerGrip® GT®3 Belt Drives
Pages 13-35
® www.gates.comd/ rivedesign 3
®
® ®
Introduction – PowerGrip HTD Belt Drives
Good torque carrying capability and Some PowerGrip HTD Belt
design versatility Applications are:
PowerGrip HTD drives provide advantages over • f loor polishers
conventional gear and chain type drives…
3mm • v acuum cleaners
• run quiet
• s ewing machines
• do not need lubricating
• require virtually zero maintenance • s anders
• high reliability and low operating costs • o ffice equipment
5mm Gates 3mm and 5mm pitch HTD belts are capable • p laners
of operating at both low and high speeds while
• c entrifuges
carrying heavy loads. They can provide higher
speed ratios than comparable XL and L pitch timing • d iagnostic equipment
PowerGrip® HTD® Belt
Profiles/Pitches belts in the same space. Compared to conventional • p ower tools
timing belts, they transmit the same power in a
• v ending machines
more compact drive package.
• j uicers
HTD belts have the same characteristics as
larger 8mm and 14mm pitch belts, but are
designed for smaller horsepower and higher speed
PowerGrip HTD Drives ............... Pages 36-45
requirements.
3mm and 5mm pitch HTD belts provide positive
non-slip power transmission with many advantages
over conventional drive systems. They can handle
tough applications, even those subject to sudden
shock and overloading.
®
PowerGrip Timing Belt Drives
Provide positive, non-slip power PowerGrip Timing Belts
MXL transmission Application Types:
PowerGrip Timing Belts are a good standard line • office equipment
XL
product with a history of reliability. Around for
• m oney handling equipment
PowerGrip® Timing Belt
ovf esry n6c0h ryoenaorsu,s t hpiosw perro dtruacnts lminies swioans pthrieo rf ltaog Gshaitpe s • f ood processors
Profiles/Pitches
introduction of PowerGrip HTD and GT Belts. • medical equipment
Gates timing belts are made with a true design • r obotics
pitch, a standard of the Rubber Manufacturers
• d ata processing equipment
Association and the International Standards
Organization. • m iniaturized applications
• m ailing equipment
• p rinters/plotters
PowerGrip Timing Drives Pages .......... 46-50
4 ® www.gates.comd/ rivedesign
®
® ®
Introduction – PowerGrip Twin Power Belt Drives
Dual driving surfaces allow for unique, NOTE: Twin Power Belts are available in GT2, HTD
problem solving drive designs and Timing Belt configurations, so designers can
use them in a wide variety of applications.
0.200’’ (1/5’’) pitch extra light (XL) Gates Twin Power Belts have teeth on both sides to
provide synchronization from both driving surfaces.
PowerGrip Twin Power Timing Belt This feature makes possible drive designs such as
Some typical PowerGrip Twin Power
Profile/Pitch multi-point drives, rotation reversal with one belt,
applications are:
serpentine drives, etc. Twin Power belts provide
• c opiers
solutions to difficult design problems.
• s erpentine drives
Twin Power Belts are similar in construction
3mm to regular synchronous belts, including nylon- • r eversing rotations
faced teeth on both sides. This construction
uses essentially the same design parameters as
standard synchronous belts. They are rated at PowerGrip GT2 Twin Power Belts ....Pages 22-23
5mm the same horsepower capacity as conventional PowerGrip HTD Twin Power Belts ....Pages 42-43
PowerGrip Belts of identical pitch and width on
PowerGrip Twin Power Belts ............Pages 51-52
PowerGrip Twin Power HTD Timing Belt either side of the belt.
Profile/Pitch
3mm
5mm
PowerGrip Twin Power GT2 Timing Belt
Profile/Pitch
®
PowerGrip Long Length Belting
For drives that require belt lengths longer Typical PowerGrip Long Length Belting
than can be produced in the conventional uses are:
endless form
• r eciprocating carriage drives
PowerGrip Long-length Belting has the same basic
• r ack and pinion drives
construction as conventional Gates timing belts.
Gates can make continuous belting in spiral cut • l arge plotters
form on a made-to-order basis.
For information or assistance on any long length PowerGrip Long Length Belting .........Page 54
belt problem, contact Gates Product Application
Clamp Plate Specifications ................Page 55
Engineering.
® www.gates.comd/ rivedesign 5
®
® ®
Introduction – Polyflex JB Belt Drives
Gates Polyflex® JB® is a joined Typical Polyflex JB applications are:
1/8” belt with a different angle • c omputer peripherals
“High Power Density” is what you get from this
3mm • b ench-type milling machines
high-precision belt. Developed by Gates and
3mm
produced using patented manufacturing processes, • g lass blowing lathes
Polyflex JB belts provide load-carrying capacity at • v alve grinding machines
3/16”
higher speeds on precision applications. Polyflex JB
• c rankshaft grinding machines
5mm belts can operate at shaft speeds well in excess of
5mm 10,000 rpm. • w oodworking spindle drives
Polyflex JB features joined belt construction for • h orizontal milling machines
Standard Polyflex® Polyflex® JB Belt stability. Backside ribs relieve bending stress on • d ental grinders
Belt Profile Profile small sheaves and provide lateral rigidity. The 60°
• f loor care equipment
angle provides more undercord support to the
tensile section and distributes the load evenly. • m icrofiche readers
The small cross-section allows belts to be used • d rilling machines
on short centers and small diameter sheaves for
• l athe drives
“cleaner” machine designs. It virtually eliminates
the need for double-reduction drives and lets you • k nife grinders
use more cost-effective single-reduction drives. • s cissor sharpeners
Gates Polyflex JB belts are a homogenous • c entrifuges
product. State-of-the-art manufacturing
• b lowers
processes assure uniformity of construction,
resulting in minimal vibration and smooth • w heelchairs
operation on precision applications. • o ptical lens grinders
Gates special high modulus polyurethane • f ans
compound has a high coefficient of friction that
• m etalworking spindle drives
resists fatigue, wear, ozone and most adverse
environmental conditions.
Cost Savings — PLUS! Polyflex JB belts bring Polyflex JB Drives Pages ....................... 77-81
V-belt economy and simplicity to applications
For additional Polyflex belt data refer to Gates
where conventional V-belts are not feasible,
Heavy Duty V-Belt Drive Design Manual #14995-A
resulting in cost savings and design freedom
never before possible.
6 ® www.gates.comd/ rivedesign
®
®
Introduction – Micro-V Belt Drives
For the best ribs around, look no Just some of the applications for Micro-V
further than Gates Micro-V® Belts Belts are:
H section
• h igh speed machine tools
Truncated tooth profile increases flexibility
and reduces heat • m illing lathes
J section Gates Micro-V Belts outperform other V-ribbed • w ashing machines
belts because the Vees are shorter. The truncated
• p recision surface grinders
Micro-V Belt Profiles (shortened) profile of the Vees give Gates Micro-V
Belts increased flexibility, reduced heat buildup and • f loor polishers
lets them perform at extra high speeds on smaller • t ool grinders
diameter sheaves.
• h igh-speed printing presses
Gates exclusive truncated design • c entrifuges
gives you…
• a gitators
• 8 0% higher horsepower capacity than RMA
• p recision center lathes
standards.
• p umps
• e xtra load-carrying capacity for extra long life.
• h igh-speed atomizers
• Truncated belt ribs for improved wedging in the
pulley grooves and greater load capacity. • t rash compactors
• p laners and molders
Micro-V Belts are smooth running and resistant
• d ryers
to oil, heat and other adverse conditions. Plus,
undercords are static conductive. • f ood slicers
• e lectric massagers
• l awn mowers
• j uice mixers
• i ndustrial vacuum cleaners
• microwave ovens
• b akery equipment
• c ompressors
• f ans
Micro-V Drives Pages ............................ 82-83
For additional Micro-V belt data refer to Gates
Heavy Duty V-Belt Drive Design Manual 14995-A.
® www.gates.comd/ rivedesign 7
®
Drive Comparison Graphs
The following graph contains a representation of horsepower ratings, over a wide speed range,
of the belt types represented in this catalog. The sprocket/pulley/sheave diameters and belt
widths are all comparable for a realistic comparison of product capability.
The following graph provides a comparison of the rated torque carrying capabilities of
synchronous belts, on small diameter sprockets/pulleys at low speeds. The sprocket/ pulley
diameters and belt widths are all comparable for a realistic comparison.
L o w S p e e d D r i v e R a t i n g G r a p h
C o m p a r a b l e D i a m e t e r s & W i d t h s
06.0
35.0
54.0
83.0
03.0
32.0
51.0
80.0
0.0
01 02 04 06 01 02 03 04 05 06 08 01
S p e e d ( R P M )
8 ® www.gates.comd/ rivedesign
®
R a t e d H o r s e p o w e r