2015
Power Transmission Products
Bushing Hardware
126
Sure-Grip®* Bushings
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Sure-Grip® bushings conform to the specifications set forth
by the Mechanical Power Transmission Association (MPTA) in
their CO-1 Guideline of October 1992.
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An “MPB” or “Minimum Plain Bore” bushing is available in
most bushing sizes. These bushings are unsplit and have no
keyway. These bushings are intended for reboring and
other alterations.
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Sure-Grip® bushings for inch shafts conform to ANSI
B17.1-1967, R1989 for key size versus shaft diameter and
keyway dimensions. Square keys are used where possible.
For larger bores where a square key is not possible, the
required rectangular key is furnished with the bushing.
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Sure-Grip® bushings for metric shafts conform to British
Standard HS 4235: Part 1:1972 for key size versus shaft
diameter and keyway dimensions. For larger bores where it is
not possible to maintain the standard keyway depth, a more
shallow keyway may be used. Special metric keys are not
furnished with the bushing.
V-Belt Sheaves, Synchronous
Belt Sprockets, Flat Belt
Pulleys, etc.
Materials
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The standard material is class 30 or higher cast iron. Products
made from cast iron have a maximum speed limitation of
6,500
foot per minute at the outside diameter. Higher speed
requirements dictate the use of higher strength materials.
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For speeds up to 16,000 foot per minute or high shock
application requiring greater toughness, special ductile iron
products can be made.
Balance
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The standard balance is a one-plane tolerance to a G26
quality grade based on 3,500 rpm or the maximum rated
speed. A two-plane balance to a G6.3 quality grade is available
at an added cost. Sure-Grip® bushed products, which are
one-plane balanced, are marked so the bushing can be
reinstalled at the application the same way it was installed for
balancing. See MPTA SPB-95 for standard balancing practices.
Standards
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The following products meet or exceed the noted ARPM
design standards:
Classical V-Belt Sheaves
IP-20-2007
Narrow V-Belt Sheaves
IP-22-2007
Synchronous Belt Pulleys
IP-24-2010
Curvilinear Belt Sprockets
IP-27-2009
FHP Belts and Sheaves
IP-23-2009
Hex Belts and Sheaves
IP-21-2009
Variable Speed
IP-25-2010
V-Ribbed Belts
IP-26-2009
Special constructions available
We have the capability to assist in your design and quote any
specially designed power transmission drive. We are able to
offer consistently competitive prices and fast delivery on the
following specials plus much more.
V-Belt Sheaves
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Nonstandard diameter requirements
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Nonstandard number of grooves
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Unusual hub configurations
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Deep grooves
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Metric grooves
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Added inertia or flywheel effect
Synchronous Sprockets
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Nonstandard number of teeth
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Nonstandard face widths
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Unusual hub configurations
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Special tooth profiles
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Added inertia of flywheel effect
Flat Belt Pulleys
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Nonstandard diameter requirements
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Nonstandard face widths
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Unusual hub configurations
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Split through rim or arm designs
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All types of special crowns
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Added inertia or flywheel effect
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Taper cone arrangements
Flywheels
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Flywheels per customer design
*
Trademark of TB Wood’s Incorporated.
General Product Information