All of the NAAMS Pt 2: The Shim Sham Shuffle

The shim sham shuffle is actually a well-known tap dance combination and has nothing to do with NAAMS.  It was just a fitting title for the topic covered in this blog post.  In this post, we will discuss Shims & Spacers from the NAAMS Global Standard Components – Assembly.

Shims

Shims are washers or thin strips of material used to align parts, make them fit or reduce wear.  Shims are designed to fit in between blocks and fixtures to provide support or reach a dimension required in the assembly.  Typically designed in a U shape matter so that they can fit between mounting screws. This shape helps to make them easy to install and remove or replace.  Designers will use shims individually or as packs of 5, 6, or 7 pieces.  Thicknesses range from 0.25mm to 2mm. Many assemblies require a tolerance to be hit in relation to a length or height, shims allow designers to hit these tolerances.  They can be stacked between NAAMS NC blocks, L blocks, or pin retainers.

They come in a variety of sizes and styles.  The material is typically very thin so that they can accommodate smaller to larger tolerances.  NAAMS specification for the material is an SAE cold rolled steel.  Different widths of the shims can have different surface treatments either yellow zinc dichromate, black oxide, or none.  Yellow zinc dichromate surface treatment is used for corrosive resistance and acts as an anti-rust primer.  Black oxide coating is also for corrosion resistance.

Spacers

Spacers are pieces of material use to create or maintain a distance between two things.  NAAMS spacers are designed for similar purposes as shims but are thicker in dimension.  Designers can determine if they require either a shim or spacer in their assembly.  It depends on the tolerances they have in their assemblies.  Most spacer designs consist of holes and slots instead of open-ended U shapes like the shims.  They can come in 3 to 5 hole configurations and thicknesses of up to 7mm.  Spacer material can be 1020 SAE Hot Rolled Steel or 1018 SAE Cold Rolled Steel with a black oxide surface treatment.

All assemblies have tolerances to hit and will have concerns about parts wearing out through the life of their machines.  Even the smallest parts like shims and spacers play a larger role in the quality of machines and the product they output.  Small parts such as these can greatly help an engineer throughout the design phase and even the maintenance phase.  One can make the comparison that engineers may have to “shuffle” their design to fit shims (and/or spacers!) between components hoping their assembly will not be a “sham”, hence the NAAMS shim sham shuffle!

Share this Story
Load More Related Articles
Load More By Carlicia Layosa
Load More In Featured Articles

Leave a Reply

Your email address will not be published. Required fields are marked *

*

Check Also

10 Tips About MISUMI’s 10th Edition Mechanical Automation Components Catalog

You asked for it, we answered! The 10th ...

Want more NAAMS?

Fill out the form below for more NAAMS content which includes White Papers and Case Studies!

FOLLOW @ INSTAGRAM

  • Happy #EarthDay! Let’s take care of our environment and help the planet!
  • The ultimate guide for engineers. Order your FREE copy today. Link in bio #catalog #engineering #mechanicalengineering #automation #80sextillion
  • Today we celebrate engineers all over the world on #GlobalEngineer Day! According to the 2019 #globalengineersurvey the number one skill engineers need to be successful is, problem solving. MISUMI engineers pride themselves on being great problem solvers! They work with customers every day to solve problems and figure out positive solutions. @discovereorg
  • It’s Spring! #firstdayofspring #springequinox #springs #misumi #80sextillion
  • GIVEAWAY
Calling all engineers! We are giving away a Single Axis Robot worth over $3,700! To enter, follow @misumiusa, like this photo and tag 3 friends in the comments. Winners will be selected at random. Contest ends March 22nd. Good luck! #MISUMIRobot #80Sextilltion #MISUMIUSA #Engineering #design #manufacturing #Robot 
http://pages.misumiusa.com/2019-Instagram-Sweepstakes-Rules.html
  • Celebrating the St. Patrick’s Day spirit at MISUMI! 🍀🍀🍀🍀
  • #TBT to our 2011 catalog compared to our new Mechanical Automation Components Metric Catalog! Swipe for the slow-mo.
  • Happy #InternationalWomensDay from MISUMI