Welcome to Misumi's new 19-minute Webinar series
For those of you here that are new to Misumi
Misumi is a global supplier of configurable components
You may ask, why configurable? What is it?
Configurable components solve designer's dilemma
A designer has two choices for components; standard
or custom. Standard components have a limited selection
and often force designers to compromise their designs.
These many pluses such as CADs, static part numbers,
fast delivery, often seem inexpensive and convenient. The other choice is custom.
Custom components have many drawbacks.
Designers have to make the solid models themselves and
all the manufacturing drawings.
Purchasers too can attest to the long wait for quotes,
the expensive set up charges for short runs, and the long lead times.
We are forced to use custom components though because of the flexibility.
Misumi offers Configurable,
which is the best of both. Easy and flexible.
Configurable components are
easy to design with and purchase. Online, select the product geometry desired,
the material and surface finish, input the size for each configurable dimension
within the range in increments shown.
You'll get a smart part number, instant price and days to ship,
and the CAD model. All of this configurability
is available with our over one million components
available at Misumiusa.com.
Now I'll turned it over to our Misumi engineer.
Hi, my name is Yau-Han from the engineering department at Misumi USA.
In this session I'll be focusing on Misumi's linear shafts.
One of Misumi's key product offerings
are shaft and rods that differ in price point and tolerances
for their different applications. Misumi linear shafts are typically used in
conjunction with our linear
bushings that ride along the length of the shaft. The dimension
accuracy in your shaft is very important because it ensures that the
linear bushing is accurately sliding along.
The first measurement of accuracy is the D section circularity
as seen in the diagram. For hardened shafts
the circularity tolerance is as low as four microns. For non-hardened shafts
the tolerance is as low as eleven microns. This is critical
as a tolerance needs to fit with the linear bushing that will be paired with
the shaft.
Misumi uses JIS standards to control the dimensional tolerance of our linear shafts.
The tolerant classes offered a g6, h5,
and f8 as seen on the table. This is a snapshot
of the JIS shafted tolerance table that could be found in the
technical data section of
our catalog. Please note that Misumi shafts with an f8 tolerance are
only offered in non-hardened materials.
Non-hardened shafts are not recommended for the use
with linear ball bushings. The next tolerance specification is the length
tolerance that is not as critical
as the shaft ends are normally mounted. As you can see,
the length tolerance can range from 0.1 to 1.2 millimeters depending on the length
of the shaft ordered.
The most critical tolerance on a linear shaft is the straightness,
as a linear bushing requires a straight shaft in order to travel
smoothly during operation.
As you can see, the straightness tolerance for hardened shafts are as low as
0.01 millimeters
per 100 millimeters or less; non-hardened shafts are 0.025 millimeters per 100
millimeters or less.
Also measured
are the concentricity and perpendicularity of each shaft. The perpendicularity tolerance
measures 0.03 millimeters for precision type shafts
and 0.2 millimeters for standard. The concentricity tolerance
of Misumi linear shafts measures 0.2 millimeters for precision type,
and 0.1 millimeters for standard types. Linear shafts are all made of steel.
The standard carbon steel is respectively soft and wears quite easily.
Because linear bushings travel directly on the linear shafts
it is important to note a key feature; all Misumi linear shafts are
induction hardened,
also known as case hardened, or surface treated to withstand the wear
of the bushing riding directly on the shaft. The common practice in bearing steel
technology is to induction hardened steel
to increase the hardness of the surface, thereby withstanding the wear of
the contacting surfaces. Induction hardening is achieved by heat treating the metal
using a special treatment to pull the carbon atoms towards the surface of the metal.
This will create a hardened case with a soft core,
resulting in a more wear-resistant material. The induction hardened linear
shafts offered by Misumi are 52100 Bearing Steel, with a hardness of at least 58
HRC and 440C Stainless Steel with hardness of at least 56 HRC.
Misumi offers a hard chrome plating for our line of linear shafts.
Hard Chrome Plating offers additional wear resistance the material
along with increased abrasion resistance. This plating can be applied to
induction hardened
or non-hardened metals. Misumi also offers a low temperature black chrome plating for
our linear shafts
for the 52100 Bearing Steel option. Low-temperature black chrome
plating offers our highest corrosion resistance
while maintaining a very high precision tolerance. This coating has a thickness
of about 1 to 2 microns.
So why are there so many material and coating options? Misumi understands that
every application is different
and depending on the environment high corrosive protection may be required.
Here's a sample of 168 hour salt water test on the different finishes
offered by Misumi. As you can see our most cost-effective
52100 Bearing Steel option is not recommended for highly corrosive
environments.
Depending on the severity of the environment Misumi offers different levels
of protection
with low temperature black chrome plating as the highest level of
corrosion resistance.
Linear shafts can be specified with the following materials:
52100 Bearing Steel, 440C Stainless Steel,
1045 Carbon Steel and 304 Stainless Steel.
Misumi also allows for the option of hard chrome plating and low-temperature black chrome
plating for certain material options.
Now that we have a good understanding of linear shafts let's take a look at
Misumi's offerings.
Our two main categories for linear shafts are solid shafts
and hollow shafts.
These can then be broken down into selectable end shapes that can then be
further specified into a configurable shaft.
Misumi offers over 60 configurable shafts.
In addition to the 60-plus configurable shapes, Misumi offers
alterations that can be applied to shaft design. These alterations include
changing the shaft length tolerance to higher precision level.
This alteration also allows you to specify the shaft length in 0.1 milimieter
increments
instead of the standard one millimeter increment.
Adding one or two sets of wrench flats, you can specify the location of the wrench
flats on the shaft.
These flats allow you to easily grip a shaft with a wrench when additional
tightening is required.
Adding set screw flats to a shaft you can specify the location
and size of the flat. Misumi also offers an alteration that allows you to add two
set screw flats at the same location
ninety degrees from each other. The flat is used to prevent the round surface
of the shaft from being damaged when clamping the shaft in place with the
set screw.
Adding one or two V grooves to a shaft you can specify the location of the V grooves.
V grooves can be used for D collars or collars with holes
for proper orientation.
Adding one or two key ways to a shaft, you can specify the size
and location of the key ways. Key ways can be used for oscillating motion
applications
to help maintain proper orientation.
Changing the thread pitch for both external and internal threads:
The standard thread pitch is always coarse for Misumi shafts.
This alteration allows you to select a finer thread pitch when necessary.
Misumi also offers an additional alteration that adds an undercut
to the threaded portion of a shaft.
Alteration availability is dependent upon the shaft type and size.
Let's visit the Misumi's website and show an example a configured shaft.
This is Misumi's globally recognized homepage. Misumi is divided into three
divisions;
automation components, press die components, and plastic mold components.
We will be focusing on the automation components for this webinar
so I will select the automation components icon.
The automation components homepage showcases our major product categories
on the left hand side and the sub categories
in the pictorial index on the right.
For this session we're focusing on the linear shafts.
From here you can narrow down your search by either filtering down on the
left hand side
or scrolling through the descriptions for your exact match.
You can also click on the Photo button to see larger pictures of each product
or Details for side by side technical comparison.
For this example I will select one end tapped
and stepped on the filter column.
Now you can see that I only have three options to select.
By selecting the first option the site will take me to the part detail page
where I can make my final specifications for my shaft.
On the part detail page, also known as the configurator,
you'll see the default drawing view with the blue configurable dimensions.
These blue dimensions can be specified in increments as low as 0.1 millimeters
for some shaft types.
For this example I'll start by going down the left-hand selection column
and begin selecting my desired configuration.
For material I'll select 52100 Bearing Steel.
For surface treatment I will select "not provided" as I do not want any surface
treatment
and the diameter my shaft will be 12 millimeters.
For hardness the only option I can select is induction hardened.
The diameter tolerance for my shaft will be g6.
Next I can manually enter a shaft length in one millimeter increments.
In this case I will select 153 millimeters.
For the precision grade I will select standard type.
For the F dimension I can reference the drawing to see that it represents the
length for the left stepped end.
I will enter 20 millimeters for this length.
I will select my thread size from the selection menu.
I will choose six millimeter thread.
Since I have identified enough my shaft specifications, the part type will appear
and indicate in red highlights
the remaining dimensions required to complete the part number.
I will continue to reference this drawing for the final dimension P
in order to complete my part number: P will equal 9.
As mentioned in the previous slide we can also add alterations to the shaft
by clicking on the More Options icon the Specifications tab
we can see all the available alterations for the shaft type.
You can then input the alteration value in the left hand specification column
to add it to your part. For this example
we will leave this blank.
After completing all the selections you'll get a part number
that is recognized globally. We can now click on the price check icon
to find the price and delivery information for this part.
Our standard one-piece price for the shaft configuration
is $28.02 with no minimum orders.
As for the delivery, the shaft will ship from our warehouse in three business days or
less.
To find out more about the delivery options we can click on the days to ship
tab
In this case the shaft has an Express A option for $8 apiece.
To find out what this express option means you can click here to see the
details.
Looking at this chart we see that the items with the standard delivery of
three days
with an Express A option selected expedites your shaft order
to one day. That means you can have a completely configured shaft
machined to your specification, ordered with the part number,
no minimum order quantity, shipped to you in one day for an additional
$8. Think of the added cost from your local machine shop to
expedite one piece of the same shaft.
Now that we have completed our part we can download the 3D CAD Model
by selecting the CAD Download Preview icon and then selecting the 3D Download
Go Configure selection. Before actually downloading
we can select the Preview tab to make sure that the shaft looks correct to our
specifications.
Once verified click on the CAD Data Download tab
to download your Misumi shaft available in many formats
including SolidWorks and Inventor or non-native formats
such as Step. Now that you understand Misumi's configurable business model
you can see how standardizing simple machine products can save you time and
money.
No detail drawings are required, no CAD drawing administration,
especially replacement parts and revision levels.
Misumi is making configurable the new standard. Here are some examples
of different shaft ends; retaining ring grooves for bearing housings
hex holes for hex keys, one end threaded or tapped for mounting
straight for standard supports, two tap holes for anti-rotation,
one end tapered for locating purposes, one end stepped to reduced housing sizes.
Next we will review some customer submitted industry examples
using Misumi linear shafts. The first design is for material testing.
A combination of linear shafts, linear bushings, and other components are used
to create a fatigue tester.
The upper portion of the workpiece holder is connected to two linear bushings
which travel along shaft allowing for accurate and easy movement up the mechanism.
This design uses hardened linear shafts to prevent deformation from occurring
between the shaft and bushing
while maintaining the precision necessary to properly perform the fatigue
test.
The next example uses linear shafts to create a fixture assembly commonly used
in the automotive industry.
The slide unit is driven by a manually operated lead screw assembly
that is guided by a set of linear shafts and bushings. The linear shafts are held in place
by split shaft supports
which clamp onto the ends of the shaft. This removes the need for machining at
the shaft ends
while still providing precise linear motion. In addition, the
linear shafts also provide support for the loads applied to the assembly.
This example shows a simple way providing linear motion in a vertical
application using linear shafts.
In this application there's no effective way to utilize linear guides
since they require continuous support along the entire rail. Utilizing linear shafts
allows for more design freedom when specialized components can be
incorporated.
In this particular case the linear shafts are press fit into a metal bracket that
serves
several functions including a shaft support. This helps reduce the total
number of parts required to achieve the necessary linear motion
and reduce the overall size and the mechanism. This model
is for vertical product placement machine used in the electronics industry.
The vertical motion of the inspection platform is achieved with the ball screw assembly.
The ball screw assembly is driven by a servo motor and guided by linear shafts.
Since the inspection platform is lightweight the moment load is minimal
and inexpensive linear shafts can be used instead of linear guides.
The final application example is an assembly station for smaller electronic
components.
Air cylinders are used with the linear shafts and linear guides to achieve
simultaneous horizontal and vertical motion.
These linear shafts help displace the applied loads and improve the overall
accuracy of the assembly.
This is an excellent example the versatility of linear shafts
in applications where it is not possible to use linear guides.
Our last example shows a simple linear actuator assembly that is completely
made up of
Misumi components. We showcased our linear shafts in this presentation
but Misumi offers a wide range of supporting product such as bushings,
shaft supports, collars and many other components to complete your automation
assembly needs.
Thank you and we hope you enjoy today's webinar.
All of Misumi's configurable components and one million products are available
at www.misumiusa.com.
If you are new to Misumi, register for access to CAD downloads
online formal quotes and orders and manage all of your account history.
For first-time companies purchasing you can receive 30% Off.
Full support is also available: technical help at
engineering@misumiusa.com, customer service at inquire@misumiusa.com,
and your local account manager at sales@misumiusa.com.
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Thank you again.