# Sienci Roughing bit feed/speed **URL:** \ **Category:** 🏃🏼 Tools & Speeds\ **Created:** [September 17, 2024, 12:20pm UTC](https://forum.sienci.com/t/sienci-roughing-bit-feed-speed/13912 "2024-09-17T12:20:03Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![TDA](https://forum.sienci.com/letter_avatar_proxy/v4/letter/t/839c29/32.png) [@TDA](https://forum.sienci.com/u/TDA)\ **Post date:** [September 18, 2024, 6:19pm UTC](https://forum.sienci.com/t/sienci-roughing-bit-feed-speed/13912/3 "2024-09-18T18:19:54Z")
Usual preface, I’m with PreciseBits. So while I try to only post general information take everything I say with the understanding that I have a bias. Not sure you are talking about the same bit. But if it’s the long 1.75" length of cut one I went through some of it with a “generic geometry” here: > [@Sienci Tool Database (up to date)](https://forum.sienci.com/t/sienci-tool-database-up-to-date/12468): > > Hi there, I was wondering if there is some place we can download the complete Sienci endmills tool database for Fusion? I was notably trying to find a one including the 1/4″ Extra Long Flat Roughing End Mill. Thanks a lot in advance for your help. Not seeing a 1/32" tapered tool in their store. To even take a guess would need to know more like flute count, taper, material, etc. However, one universal thing is that if you are using it for 3d carving with a 8-10% stepover. You can go a pretty fast as the chip thinning means you are actually cutting MUCH less than you think. As an example 50IPM on a 2 flute running at 10KRPM is a 0.0025" chipload (what really matters). However, if you are cutting that with a 8% stepover you would only really be cutting a 0.00136" chipload. Meaning in order to cut the 0.0025" you would need to actually cut at 1.84x or 92IPM. Hope that’s useful. Let me know if there’s something I can help with. --- _[View the full topic](https://forum.sienci.com/t/sienci-roughing-bit-feed-speed/13912)._