Tech Tip #8 - Reamer Guidelines

Kennametal can recommend a drill size that will leave an appropriate amount of material for the reamer to efficiently size the finished hole.

General guidelines for drill sizes are:

  • <1/4” = .010”
  • ¼” to ½” = .015”
  • ½” to 1-1/2” = .025”

A common misconception is to leave too little material for the reamer to remove. The reamer needs enough material to make its cut. Too little material will cause the reamer to rub or burnish and results in accelerated wear and poor surface finish.

Cutting speeds should be about two-thirds that of drilling SFM for similar material and feeds should be two to three times higher. 

You are about to add to your My Solutions page. Do you want to proceed?
product-image
Please adjust the following properties from

ISO Catalog Number

ANSI Catalog Number

to find similar products.

The following files are available

Please select a file to download

Models

Product data

You should be logged to see your dashboard information
Session expired due to inactivity, please login again
The product/s () you were trying to add to the cart is/are not available, please contact customer service
item(s) successfully added to the cart
View Cart

. Please enter the desired qty for the material(s) you want to include in your promotion or Proceed Without Promotion and only your base materials will be added to the cart.

Minimum quantity should be

SAP Material Number ISO Catalog Number Grade    
Thank you for your registration, pending approval & completion of the registration, your access is currently limited. Full utilization of product search capabilities & collaboration space is available and will remain. Please allow 2 business days for registration completion.

You are about to leave the Solution building process.

Are you sure you want to leave?