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Baldors Mission Statement
is to be the best
(as determined by our customers)
marketers, designers and manufacturers of
industrial electric motors, mechanical power
transmission products, drives, and generators.
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COMPLEMENTARY MASKA PRODUCTS
1. Couplings 2. Weld-on hub (XT QD) 3. QD
Short Bushing 4. 1VP 2VP PULLEYS
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1.0 RIGID OR FLEXIBLE COUPLING?

• Used to connect shafts that are precisely aligned

• Accommodates misalignment
• Dampen vibrations or shock load
• Used for most industrial applications, rather
  than rigid coupling, because of these multiple
  functions

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1.0.1 TYPES OF FLEXIBLE COUPLINGS
A. Metallic types

• Torsional stiffness
• Operates in relatively high ambient temperature
  and/or in presence of certain oils or chemicals
• Electric motor drive only - not recommended for
  combustion engine
• Applications with relatively constant loads

B. Elastomeric types

• Torsional softness (absorbs shock and vibration)
• Allows more angular misalignment between shafts
• Lower cost and lighter weight
• Smoother and quieter operations

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1.0.2 Flexible coupling - Elastomeric
types

• Maska Starflex
• compression type can transmit more torque in
  less space and easy to install
• 4-FLEX
• shear type allows torsional wind-up and
• transmits higher torque
• Maskaflex
• shear type coupling generally produces
• lower shaft loads when submitted to parallel
• offset misalignment

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1.1 Jaw Coupling - compression type

• First patented in 1927
• Simple design - three components two hubs and
  one elastomeric element
• It is called a compression type coupling, because
  torque is transmitted by conversion between the
  driver hub and the driven hub

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1.1.1 Features of Maska Starflex coupling

• Fail-safe when equipment cannot be allowed to
  stop. If the elastomeric element should fail, the
  coupling will still transmit the torque due to
  the metal-to-metal contact.
• Great capability to handle torque over loads or
  spike
• Simple to install, compact and low cost
• Angular misalignment is more limited than in
  shear-design

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1.1.2 Maska Starflex coupling
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1.1.3 Element material
A. NBR Buna-N B. Urethane C. Hytrel D. Bronze
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1.1.4 Element material - NBR
Most commonly used element material for all
general applications - Pumps, gear box, etc.
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1.1.5 Element material - Urethane

• Greater torque capacity than rubber
• Good abrasion / wear resistance
• Better resistance to environmental conditions
  such as ozone, ultraviolet and some oils or
  chemicals agents.
• Should not be used in cyclic or start/stop
  applications
• Limited to 160F

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1.1.6 Element material - Hytrel

• Higher torque capacity than rubber and urethane
• Best chemical resistance, compared to urethane
  and maximum temperature of 250F
• Angular misalignment less than urethane and
  rubber. 1/2 compare to 1
• As urethane, should not be use in frequent
  start/stop applications or regular shocks and
  vibrations

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1.1.7 Element material - Bronze

• Not elastomeric, but an option for high
  temperatures, such as 450 F
• Could be used in salt/marine applications
• Only used in slow speeds, generally below 250
  rpm, since its a metal-to-metal contact which
  increases wear

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1.1.8 Element material
Technical Chart Maska Starflex element
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1.1.9 Maska Starflex coupling selection

• Coupling selection
• Rated Torque chart

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1.2 4-FLEX - Shear type
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1.2.1 4-FLEX Product description

• 4-way flexing action
• All types sizes in cast iron
• No lubrication smooth, quiet power transmission
• Fast easy installation no special tools or
  accessories required
• Precise concentrical product to avoid run-out and
  unbalance
• Flanges and sleeves manufactured in Canada

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1.2.2 4-FLEX Technical Features

• Tight bore tolerance (.0005 / .0015)
• Over 1000 HP _at_ 1750 rpm
• J S flanges are bored to size
• B flanges are mounted with a QD bushing

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1.2.3 4-FLEX General Characteristics
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1.3 Features of Maskaflex coupling

• Compared to other couplings in the industry, the
  tire coupling is the most suitable for
  applications with shock loads, angular
  misalignment up to 4 degrees or end float up to ¼
  inches.
• It is made of natural rubber and reinforced
  tension member bonded together. The element has a
  special series of cables near the flange
  attachment that offers longer life expectancy
  and prevents premature shear failure.

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1.3.1 Features of Maskaflex coupling
ANGULAR MISALIGNEMENT Up to 4 deg.
AXIAL OFFSET Up to 0.25"
PARALLEL MISALIGNEMENT Up to 0.125"
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2.0 WELD-ON HUBS FAMILY
1) QD SERIES - GENERAL APPLICATIONS
2) XT SERIES - CONVEYOR PULLEY

WELD-ON HUBS ARE MADE OF STEEL TO
FACILITATE WELDING

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2.1 Weld-On Hub QD
H QD PART
All size available excepted S
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2.1 Weld-On Hub QD
Product Features applications

• The QD weld-on hub are used in a wide range of
  applications such as plate steel sprocket,
  conveyor and fan blades.
• All Maska Weld-on hub are made of steel since
  cast iron is difficult to weld. Once a material
  contains a high level of carbon, this will reduce
  welding capabilities.
• Maska QD bushings have a synchronized keyway with
  bolt holes so they can be easily used once two of
  these need to be installed face to face on the
  same keyed shaft

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2.2 XT HUBS BUSHINGS
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2.3 XT Conveyor pulley
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2.4 XT Hubs Bushings
Product features

• Not interchangeable with QD or any other bushing
  even if it has a similar design.
• Supply with hexagonal head cap screws and spring
  lock washers like QD bushings for installation.
• Van Gorp / Browning is the original manufacturer
  of these kind of weld-on hubs

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2.4 XT Hubs Bushings

• Taper is 2" per foot compared to QD which has ¾
  per foot.
• XT bushings are shorter compared to QD and will
  only fit in these hubs (XTH).
• Only sizes XTB100 XTB120 are made of gray cast
  iron.

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2.5 XT HUB BUSHING DESIGNATION
MASKA OFFERS STANDARD SIZES

• Bore sizes in stock match with popular bearing
  housing sizes to support the shaft-conveyor
  pulley assembly.
• XTB Series number corresponds approximately to
  the max. bore per model like Taper-Lock bushings
  nomenclature

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3.0 Short QD bushings

• Standard QD J

short QD J
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3.0 QD BUSHING SHORT

• Same features than the QD but with a shorter
  barrel or taper length. 100 interchangeable with
  competitors.
• Short QD bushings are only available from J
  through S.
• Supplied with shorter Hexagonal bolts than QD but
  still comes with set screw and lock washers
• Would not be appropriate on v-belt pulley since
  stability is required for multiple grooves pulley
  so they are generally used face to face with
  conveyor pulley or alone with a steel plate
  sprocket, blade, impellers that are not too wide.

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4.0 VP- SERIES DESIGNATION
MASKA OFFERS ALL SIZES
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4.1 Variable pitch sheaves - VP series
1VP 2VP

• The VP series is equivalent to 8000 series. The
  8000 series generally offers a wider range of
  speed.
• Designed for A (4L), B (5L) and 5V belts. 3L
  could also be used
• Offers half turn adjustment up to 6 turns.
• All made of gray cast iron

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4.2 VP types
TYPE1 - WITHOUT A KEY ONLY SET
SCREWS OVER THE HUB
TYPE 2- WITH A KEY THROUGH THE HUB
Only one set screw per flange like
Browning
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