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Rino
Mechanical, your technical and manufacturing
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Gearboxes + Misalignment
Couplings + Precision Spur Gears
Ground Shafting + Precision Shoulder Screws +
Custom Parts
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Your own Rino
rep, expert technical solutions, quick responses |
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I guarantee
you will be satisfied! |
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Steve Pullman,
President |
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Integral Clamp Spur Gear
saves money (click here) |
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Molded Beam Couplings versus
Metal Beam Couplings (click
here) |
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Miniature Plastic Universal
Joints and how to determine angular torque ratings (click
here) |
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Precision Gear Racks - alternates to expensive Catalog
versions (click here) |
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Integral Clamp Spur Gear
 There
are 3 ways to fix a spur gear to a shaft: 1. using a
hub type with one or two set screws that contact the
shaft; 2. using a split hub with an added hub clamp;
3. a special locking hub clamp (read expensive). The
new integral clamp spur gear eliminates the extra
cost of added clamps, makes installation quicker,
reduces inventory and provides a very tight fit to
the shaft.
Because of the straight cut in the clamp section is
parallel to the shaft axis, you have almost 360
degree shaft contact. With the clamp integral to the
gear it gives superior holding power over set screw
or external clamp type fixing.
It is available on any gear made in quantity of 50
or more in any material a gear is made from.
(click
here to send an email quote request)
(click here for product info) (Return) |
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Molded Beam Coupling
Replaces Metal Couplings
 Beam couplings made from stainless steel and
aluminum utilize 1 to 3 continuous slots or 2 sets
of 3 continuous cut slots into the relief area of
the coupling. When you analyze this type of beam
coupling you realize what you have is a "wound
spring". One beam coupling company actual sells
"engineered springs" that look like beam couplings.
This spring like construction causes the coupling to
have wind up which you could call backlash in
reversing applications. This spring like
construction causes a de-rating of the beam coupling
torque by 50% for use in reversing applications.
The Step-Beam™ Coupling, with patents issued and
patents pending, is molded and uses geometry and an
engineered polymer to give the flexibility needed
for misalignment coupling applications. Because of
this unique type of beamed coupling construction
there is no wind up or backlash or any de-rating for
reversing applications. Torques from 4.5 in-lbs to
33 in-lbs. Shaft diameters from 1/8" to 1/2, 3mm to
12mm. Larger sizes available shortly.
Shaft fixing uses metal screw to metal nut contact
for complete tightness and does not utilize threads
cut into the engineered polymer it is molded from.
The Step-Beam™ coupling allows you to lower your
costs without compromise over metal beam couplings
because of the equivalent or better torque ratings
and its molded construction.
(click here for product info) (Return) |
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Plastic Universal
joints and how to determine angular torque ratings
 These miniature joints are designed for light duty
applications such as laboratory instruments, small
business machines and electro-medical apparatus
among others. Made from Delrin™ plastic, brass
cross-piece (optional plastic cross-piece for lower
cost) and extended brass inserts with dual set
screws give you low mass, low inertia and firm shaft
fixing. These joints are corrosion resistant,
electrically isolating but only have a fraction of
the torque capability of steel joints.
These miniature plastic joints are back-lash free up
to 1,000,000,000 turns. Their temperature rating is
-20 deg. C to +60 deg. C. Alternate materials are
available for higher temperature operation.
Shaft sizes 0.125" to 0.75" and 3mm to 20mm.
Peak torque (single joint up to 45 deg.) for 7 sizes
is from 1 in-lbs to 94 in-lbs.
Peak torque (double joint up to 90 deg.) for 4 sizes
is from 0.7 in-lbs to 11.5 in-lbs. Peak torque
ratings are for zero angle.
The following procedure will give you the needed
torque rating for the angle you are looking for. |
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How to determine Universal Joint angular torque
capacity
Peak torque values apply only when the working angle
is zero. This calculation takes into account dynamic
loading at the joint bearings.
To determine angular operating torque: determine
application speed, torque and operating angle.
Then
1) Multiply speed x working angle
2) Subtract the result from10,000
3) Divide the answer into 10,000
4) Multiply this result by the application torque
For example:
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speed |
= 400 rpm |
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application torque |
= 0.1Nm |
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working angle |
= 20 degrees |
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Then: |
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1) 400 rpm x 20
degrees |
= 8,000 |
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2) 10,000 -
8,000 |
= 2,000 |
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3) 10,000/ 2000 |
= 5 |
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4) 5 x 0.1 Nm |
= 0.5Nm |
Select a joint where
the Peak Torque exceeds 0.5Nm
Note: To remain within the capacity of the joint,
the result of speed x working angle must be less
than 10,000.
(Click here for product info) (Return) |
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Precision Gear Racks
Round or rectangular style gear racks are made from
416 stress relieved stainless steel and machined to
AGMA 8 for 16 and 20 pitch and AGMA 10 quality for
24 to 120 pitch. Exact equals to precision catalog
specifications are available in quantities of 10 to
1000 with quick delivery. Modifications such as
length, mounting holes, etc. can be provided as can
completely custom precision gear racks.
(Click here for product info) (Return) |
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