www.PrecisionStraightEdge.com

Mike Petsch & Associates, Logo Special Precision Straight Edges


       
  Custom Designed Straight Edges are Available
       

Sample PDF Prints for Specials

We also manufacture a complete line of steel standard straight edges with lengths from 36" to 180". Most customers start with one of our standard steel units and make a few modifications. We can easily add a second edge, change the thickness, bevel the edge, or drill mounting holes for a small extra charge. The hot rolled steel is easy to work with and makes a very stable straight edge. Tool steel is not available for lengths longer than 144-inches and there are very few heat treat facilities that can handle longer lengths.

We can build special straight edges to your specifications. Our customers have already ordered specials that measure from 15 inches (381 mm) to 16 feet (4,877 mm) in length. Please take a look at the sample prints for some of the special designs we shipped. We offer many options that require choices for the design of a special straight edge. Please call us at (937) 438-8031 if you have any questions about designing your straight edge. We can usually find a low cost design together that will work for your application.

All of these details and choices can be confusing, so at some point in this process you can expect a CAD drawing of the proposed straight edge to make sure we both understand what you expect. Then after we received your order and upon your final approval of the design, we will start building your special straight edge.

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  CAD Drawings Utilized
 

Special Straight Edge

       
  Designing Your Straight Edge Requires Information
       
  To design a special straight edge someone needs to make choices for each of the following selections before the unit can be quoted. We already know our preferences but now we need your input to find out what meets your expectations. We have designed a PDF form to make it easier to specify your requirements than several emails or phone calls to answer questions. This form asks about the following information. TO USE THIS FORM - YOU MUST FIRST DOWNLOAD AND SAVE THIS FORM TO YOUR COMPUTER. It cannot be filled out on line as it must be opened with the real Adobe Acrobat Reader and not your web browser's simulated verson of a pdf reader.
       
  Sample special straight edge specification form
  • Contact Information?
  • Dimensions?
  • Metal Type?
  • Number of Precision Edges?
  • Edge Location?
  • Flatness & Straightness Tolerance?
  • Cut Outs to Reduce Weight?
  • Channels Cut to Reduce Weight?
  • Holes for Mounting Unit?
  • Bevel on one Edge?
  • Finish on Non-Certified Edges?
  • Chamfer Corner?
  • Serial Number Placement?
  • How will Edge be Used?
  • Inspection Procedures?
  • Documentation Required?
  • Packaging Required?
       
 

DownLoad Form

Or if you really hate forms, just send us an email. Just let us know how you would like to handle the items listed above.

       
 

Straight Edge 144

       
 
Dimensional Data - Design Factors
       
  The cost of special straightedges is based on your specification from the above selections. We can even make special units from just about almost any type of hardened steel that you might specify but prefer to work with the steels listed above. Heat treating some exotic types of steels is challenging and very expensive for longer straight edges. Heat treated straight edges frequently require an additional straightening and a stress relieving prior to precision grinding.

We do make straightedges from non-magnetic materials such as stainless steel, aluminum, and ceramics, but the cost these units cost more because the material is expensive and they are more difficult to grind. The soft edges on Aluminum straight edges are much easier to nick or scratch than edges on steel units.
       
  Most of our smaller straight edges are 3-inches high to increase rigidity. Units longer than 8-feet long are at least 4-inches high and our 14-foot long unit is 5-inches high. We typically drill large 2-3/8 inch diameter holes in these straight edges that are over 8-feet long to reduce the total weight of the unit. Standard straight edges up to 14-foot long are 1/2 inch wide to reduce bowing and bending, but they are not designed for unsupported loads in this axis. The 1/2 inch width allows the unit to safely stand on edge without falling over. We can also manufacture thinner units, but you may find that they may feel flimsy.

If your application requires a narrow edge, you could specify a beveled edge. Of course we can also make both thicker and wider units for an additional cost, but the increased weight can be a problem with longer straight edges. The weight for a steel design can be calculated by the following formulas:
       
 
  • Steel Unit Weight (in pounds) = Length (inches) x Width (inches) x Thickness (inches) x 0.283
 
  • Aluminun Unit Weight (in pounds) = Length (inches) x Width (inches) x Thickness (inches) x 0.094
       
  While we closely hold the flatness and straightness for usually ONE edge, the height dimensional tolerances is usually considered a nominal size that are subject to change after grinding. The length tolerance is usually held only to the dimension as sawed and the width is usually the nominal dimension for the stock thickness.
       
       
Contact Information - Call 937-438-8031  
 

   

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