Misumi USA Engineering Blog

To eliminate line noise from the RSH controller first check that the controller is connect to a good Earth ground. We also recommend that a noise filter be placed on the incoming AC power line near the C11 or C11 controller.

Misumi offers a noise filter that will work to reduce the noise on the AC line for most applications. The Misumi part number for this filter is EXRS-NF1.

If this filter doesn’t reduce the noise on the AC line sufficient for your application. We recommend that you add a 0.5 kW to 1 kW line isolation transformer. This transformer is readily available from an electrical supply house.

See Tech Notes RS-11-001: How to Reduce AC Power Line Noise from the C11 & C11 Controllers.

"You are already logged in with this ID. To continue, re-type your password.  If someone else is currently logged in using your ID, that person will be forced to log out" when you try to log into our site. 

If so, there is a very easy solution.  Before I get into the solution, let me explain exactly why this happens.  When you log into our website, two things happen.  First, a unique key is generated and stored as a cookie on your computer.  Second, the database that runs the website records that you are "logged in".  Now, if you lose that cookie that has your unique key in it (for example, by closing your web browser) without explicitly logging out of our website, then the next time you try to log in, the website will see that, according to our database online, you are still logged in.  But, since your computer does not have the login cookie, it assumes that someone else it trying to log in as you.  That is why you receive that error message. 

Now, the good news is that it is very easy to fix this situation.  Once that error message appears, simply enter your username and password again, and you will be able to log in as normal.

Have you tried registering with our website, but can't log in? 

Well, the problem may be that you failed to receive our verification email. 

Registering with Misumi is a two step process.  First, there is the online registration that must be filled out.  Once that is filled out, that triggers the second stage.  The second stage is an email that is automatically sent to the address you previously entered.  Contained inside this email is an activation link.  This activation link is only valid for 14 hours.  If you click on this link within 14 hours, it will activate your account.  It is only then (after your account become active) that you will be able to log in. 

Now, if you never received an email from Misumi after the first part of the registration, it is most likely due to a spam filter.  Don't worry, you can still register, but you will need to contact Misumi Customer Service in order to activate your account.

We have been asked by several customers what is contained in the RS unit package.

The RS units contain the following:

• The actuator with integrated ballscrew, motor and Magnetic encoder
• Controller
• Cable connecting the unit to the Controller
• Instruction manuals for The robot and the controller (on CD)

The PC based RS Controller software is not part of the package and can be purchased separately along with a special USB cable connecting the Controller to a PC.

Other optional components that can be purchased are:

• Handy terminal in two different versions,
• I/O cable
• Noise Filter
• Set of printed manuals.

To extend linear guides life, it is highly recommended to reapply grease to them periodically unless the application requirements prohibit any kinds of lubricants. Lubricant prevents against metal to metal contact and also minimizes retainer wear by reducing friction. Grease should be periodically reapplied depending on the operating conditions.

Misumi recommends lubrication intervals every 100km of travel or 6 months which ever comes first for normal conditions and every 3 months under severe conditions (high speed, high load etc…). 

In case you need to have either “Light-Press Fit” or “Press Fit” between shafts and Ball Bearings instead standard “Sliding Fit” that Misumi shafts with g6 tolerance produce with ball bearings combination, please refer to new addition “Drive Shafts” and alterations either PJ or DJ (js6 tolerance for “Light-Press Fit”) or PK or DK (k6 tolerance for “Press Fit”).  

http://www.misumi-ec.com/eusaen/pdf/fa/p0639.pdf 

http://www.misumi-ec.com/eusaen/pdf/fa/p0641.pdf 

http://www.misumi-ec.com/eusaen/pdf/fa/p0643.pdf 

http://www.misumi-ec.com/eusaen/pdf/fa/p0645.pdf 

If you are looking for rotary shafts with three key grooves positioned from on end (It is also available when compining alterations KC & WKC but two grooves are positioned from one end and one groove is positioned from the opposite end which in some cases can be crucial) refer to new styles added to our website: Click Here 

To extend a Ball Screw's life, it is highly recommended that you reapply grease to them periodically unless the application requirements prohibit any kind of lubricants.  Lubricant reduces metal to metal contact and also minimizes retainer wear by lowering friction.  Grease should be periodically reapplied, depending on the operating conditions.

Misumi recommends lubrication intervals of every 6 months for normal conditions and every 3 months under severe conditions (high speed, high load etc…). 

Our ball screws are packed with lithium based soap grease, the Misumi grease part number is: GAV1.  For special greases go to our blog titled: “Greases for special environments”.

The Misumi Website was designed to run on Internet Explorer 6.  When Internet Explorer 7 came out, Microsoft changed one of the default security settings.  Unfortunately, the function of the Misumi website (specifically, the pricing frame located below the part configurator) depends on the origonal (IE 6) default security setting, and not the new (IE 7) setting.  Fortunately, it is not difficult to change.

1.  In Internet Explorer, select Tools - Internet Options

1.  Click on the Security Tab

3.  Click on the Custom Level… button

4.  Type "n" on your keyboard (this will select then "Navigate sub-frames across different domains" option

5.  Change the selection from Disabled to either Enabled or Prompt

Once completed, the web page should function normally.

Several customers have asked, "What would I safely size a locating step for a Misumi linear guide rail?"  We do not specify the chamfer size on most of our linear guide rails and it's not easy to determine the maximum radius on the step.  If you look at our height adjust blocks (GETA for miniature guides and BETA for standard guides), you will see the reference step feature for each size of the corresponding linear guide. You will also find step height and maximum radius for this product. It is safe to use the same dimensions for your locating step feature. The spacer height is configurable in 1mm increments. Many of our linear guides are now offered with mounting dowel holes on either the rail or blocks or both, which will allow you to get by without the locating steps altogether.

To find the actual chamfer size of a linear guide rail, please see our Global Voice article below:  Explanation of Linear Guides The Design of the Slide Guide Mounting Face. 

Some of our customers have asked us about parts that exsisted in the 2008 Metric catalog that are no longer available in 2009. Generally, those are the parts that were recently introduced, but had not been very popular. Usually these components are still available until end of March of the following year. Our 09 catalog was released at the end of 2008, so those parts should be available until end of March 2009. In some cases the parts may still be sold for several years after they have been removed from the catalog. To find out if a part is still available, send the part number to our customer service and they will check verify if the part can be obtained.

You can reach customer service by calling Misumi at (800)-681-7475, Fax us at (800)-681-7401 or email us at Inquire@misumiusa.com To view a list of Discontinued Parts, CLICK HERE. 

To extend linear ball bushing life, it is highly recommended to reapply grease or oil to them periodically unless the application reqirements prohibits all kinds of lubricants.  Lubricant prevents metal to metal contact and also minimizes retainer wear by reducing friction.  Oils are used where low friction is a primary requirement.

Grease or oil should be applied to the internal compartment of the Linear ball bushings.  The grease or oil should be periodically reapplied depending on the operating conditions.  Reapplication may be done by adding the grease directly to the internal compartment (Using grease fitting in housing if existing) or by greasing or oiling the shaft .  A Six month lubrication interval should be sufficient for most normal operationing conditions.  If the linear ball bushings works under severe conditions (high speed, high load, high reciprocating motion etc…) a three month lubrication interval is recomended.

For applications with limited access to linear ball bushings or for re-lubrication or no downtime, Misumi offers linear ball bushings with a lubrication unit MX equipped with solid lubricant which requires limited or no maitanance.

SPECIAL NOTE: Linear ball bushings shown in our 2009 catalog from page 155~175 do not come with grease already applied but only with the antirust oil. It is recommended to apply grease before using the bushings and re-apply grease accordingly.  Only bushing with special lubrication unit MX and bushings order with special environment grease have grease applied before they are shipped.

Information on how to apply and re-apply grease is outlined above. 

https://www.misumi-ec.com/eusaen/pdf/fa/PDFViewer.html?catalog=metric&page=149
https://www.misumi-ec.com/eusaen/pdf/fa/PDFViewer.html?catalog=metric&page=151

The question is what is the torque required to properly lock the bearings?

The bearing locknuts are usually used with angular contact bearings, but in some cases are also used with regular deep groove ball bearings. When installing the bearing locknuts, you won't really find an exact torque spec for this application. All that's required is that there is a minimum pre-load on the inner race of the bearing. It can be achieved by locking the nut "just snag" on the inner race. It can even be done by hand or with very low force when you use a wrench. It is critical that the nut is not mounted to tight because it may result in locking of the bearing race.

When you order the bearing locknut (the BNG family), it will come equipped with a set screw and a small soft metal "crash pad". Once you secure the nut on the inner race of the bearing, simply drop the crash pad in the threaded hole and drive the set screw in. The set screw will deform the crash pad and prevent the nut from loosening. The advantage of using soft material crash pad is that you will not damage the shaft thread shich is much harder that the pad.

Misumi products are used in wide range of fields, characterized by different environmental conditions. In order to meet the specific needs Misumi is offering different type of grease.

For more information about different grease types see page 130 in our 2008 catalog or simply click on link below:
https://www.misumiusa.com/PDFViewer.aspx?Metric=true2008&Page=119

Different grease types can be specified with following components.

Q: Do the Dimensions and Tolerances in Misumi Catalog apply to parts before or after plating?

A: Dimensions shown in catalog apply to finished product.

Customers often gets confused why some linear guides (including miniature) in our catalog are described as “interchangeable”.

In the Misumi catalog word “interchangeable” is used to describe linear guides whose components can be purchased separately. The catalog page for the interchangeable linear guide will show separate part number (price and days to ship) for the guide rail and guide block . Of course when ordering parts separately, customers need to specify the same size for both parts (rail and block) if they are to fit together.

E.g. Catalog page 305/2008 catalog.

SEBZ10- Interchangeable Miniature Linear Guides with Standard Block (shipped as a set)

SEBZ10-Guide Block for SEZB10 (can be purchase separately)

STZL10-Guide Rail for SEZB10 (can be purchase separately)

If customers buy two same (size) sets (1rail+1block) but later on decides that only one rail with two blocks is needed, he/she can simply remove a block from one rail and add it to a second rail.

If the linear guide is not interchangeable then this unit can be purchased only as a set and customers should not remove block(s) from the rail and mount them on the different rail as in previous example.

If shafts with g6 tolerance are used with linear ball bushings fit vary from clerance to transition fit with dominance of clerance fit. If shafts with h5 tolerance are used fit vary from clerance to transition fit also but with dominance of transition fit (light preload fit).

The Linear Ball type stages use an integrated Gothic Arc design which provides high rigidity and precision, but uses fewer components and thus decreases the probability of alignment errors. It requires less space, and is more cost effective. It is made of stainless steel, which does makes it slightly heavier and gives it a metallic look.

The 2008 Metric Catalog features10 pages of NEW Linear Ball type products starting on page 935. 

Click here to visit page 935 in the online catalog. 

Our catalog often shows surface roughness information at the upper right hand corner of the drawing. This information will show a roughness value, and one or multiple values in parentheses. Please, see the example from page 159 from FA 2008 metric catalog. "Photo 1" The value before the parentheses means: unless otherwise specified, all surfaces are 6.3 μm and all values in parentheses represent other surface roughness specified on the drawing. 

Metric threads have a different callout then US (inch) threads. Metric threads specify the pitch while US threads specify number of threads per inch.

Example:
Metric
M6 x 1 ( 6- nominal thread diameter in mm, 1mm-distance between threads in mm)

Inch
¼-10 (1/4-nominal thread diameter in inch, 10-number of threads per inch)

Pitch from metric fasteners can be coarse, fine and extra fine. The pitch callout on coarse thread is often omitted. For example, “M6” thread by default stands for coarse thread M6 x 1. Thread call out that includes the pitch “M6x0.75” specifies non-coarse thread (in this case fine thread). Also all threads are right-hand threads unless otherwise specified.

Majority of standards (JIS, ISO, DIN) follow this convention.

For more information about Metric Coarse Threads please see pages 1568/1569 in the 2008 Misumi Metric catalog. Also, see the following links.

Table for Metric Coarse Screw Threads
Table for Metric Fine Screw Threads