# Shopbot PDF: Selecting the Right Bit; Feeds & Speeds Chart **URL:** \ **Category:** Found and Shared\ **Created:** [June 19, 2020, 11:28am UTC](https://forums.maslowcnc.com/t/shopbot-pdf-selecting-the-right-bit-feeds-speeds-chart/13757 "2020-06-19T11:28:04Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![zaneclaes](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/zaneclaes/32/16801_2.png) [@zaneclaes](https://forums.maslowcnc.com/u/zaneclaes)\ **Post date:** [June 19, 2020, 11:28am UTC](https://forums.maslowcnc.com/t/shopbot-pdf-selecting-the-right-bit-feeds-speeds-chart/13757/1 "2020-06-19T11:28:04Z")
A nice concise explanation of these topics for CNCers, found while googling: > **[ShopBotFeedsandSpeeds.pdf](https://content-calpoly-edu.s3.amazonaws.com/dfab/1/documents/ShopBotFeedsandSpeeds.pdf)** > > 354.48 KB ---
**Author:** ![mooselake](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/mooselake/32/6218_2.png) [@mooselake](https://forums.maslowcnc.com/u/mooselake)\ **Post date:** [June 23, 2020, 12:56pm UTC](https://forums.maslowcnc.com/t/shopbot-pdf-selecting-the-right-bit-feeds-speeds-chart/13757/2 "2020-06-23T12:56:31Z")
Keep in mind that Maslow feed rates are way slower than the much more expensive Shopbot. ---
**Author:** ![zaneclaes](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/zaneclaes/32/16801_2.png) [@zaneclaes](https://forums.maslowcnc.com/u/zaneclaes)\ **Post date:** [June 23, 2020, 1:15pm UTC](https://forums.maslowcnc.com/t/shopbot-pdf-selecting-the-right-bit-feeds-speeds-chart/13757/3 "2020-06-23T13:15:27Z")
Yep — I’d encourage others to pay attention to the first half of the document, which explains how to calculate Feeds & Speeds (Chip Load) yourself. Then (I believe) you can look at the chart and ignore the IPS & RPM, instead calculating them yourself in order to achieve the same chip load. ---
**Author:** ![Rufino\_Rodriguez](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/rufino_rodriguez/32/11960_2.png) [@Rufino\_Rodriguez](https://forums.maslowcnc.com/u/Rufino_Rodriguez)\ **Post date:** [June 25, 2020, 10:13am UTC](https://forums.maslowcnc.com/t/shopbot-pdf-selecting-the-right-bit-feeds-speeds-chart/13757/4 "2020-06-25T10:13:14Z")
Hey, I have been thinking about making a similar document but more relavent to Maslow uses. I have been entering end mill size, number of flutes, ipm, rpm, chip load, depth of cut, material , material thickness and 1 out of 5 rating for the cut into an Excel file. If we could collect enough data from multiple uses we should be able to generate a database that anyone can reference. In this sinerio it would also be really good information if we included brand name and links to the actual end mills that where used. I will admit that I have no clue what I am doing most of the time and I am simply guessing when I set up my machine. Is this something people would be interested contributing to and using? Cheers Rufino ---
**Author:** ![talyrath](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/talyrath/32/12810_2.png) [@talyrath](https://forums.maslowcnc.com/u/talyrath)\ **Post date:** [June 27, 2020, 3:25pm UTC](https://forums.maslowcnc.com/t/shopbot-pdf-selecting-the-right-bit-feeds-speeds-chart/13757/5 "2020-06-27T15:25:29Z")
There’s a wiki page for feeds and speeds here: > **[MaslowCNC/Mechanics](https://github.com/MaslowCNC/Mechanics/wiki/Stock-Materials)** > > Digital Design Files. Contribute to MaslowCNC/Mechanics development by creating an account on GitHub. There’s also good discussion of feeds and speeds here: [Recommended Feed Rates](https://forums.maslowcnc.com/t/recommended-feed-rates/93) The consensus seems to be “faster, shallower passes instead of deep slow ones”