Cleveland Twist Drill Chart

Share your phonograph repair & restoration techniques here
Post Reply
MarkELynch
Victor II
Posts: 322
Joined: Tue Jun 02, 2009 10:19 pm
Location: Silver Spring, MD

Cleveland Twist Drill Chart

Post by MarkELynch »

For those of you that do machine work here is a useful wall chart that may help when selecting drill bit sizes.
Lots of information in one easy to use chart including fractional, wire size and lettered bits.
Also, the tap drill sizes are listed for common threads.
I hope the resolution is high enough that you can print it out for your bench or wall. The original metal chart is 17” x 25”
Sorry, no metric sizes.

Mark
201AC918-4DE2-40CC-8AFA-3DA7EB5221F9.jpeg

User avatar
PeterF
Victor IV
Posts: 1913
Joined: Sun Jul 08, 2012 1:06 pm

Re: Cleveland Twist Drill Chart

Post by PeterF »

Let’s twist (drill) again, like we did last summer.
Attachments
2A721844-F96C-4433-980C-7647D92E83C4.gif
2A721844-F96C-4433-980C-7647D92E83C4.gif (374.33 KiB) Viewed 541 times

JerryVan
Victor Monarch Special
Posts: 5281
Joined: Mon Aug 24, 2009 3:08 pm
Location: Southeast MI

Re: Cleveland Twist Drill Chart

Post by JerryVan »

I love those charts. Have them hanging all around my shop. My favorite shows optional tap drill sizes for any given thread, along with a percentage of thread engagement resulting from each drill size. Good to know, when tapping very tough material where full thread engagement may end up with a broken tap.

MarkELynch
Victor II
Posts: 322
Joined: Tue Jun 02, 2009 10:19 pm
Location: Silver Spring, MD

Re: Cleveland Twist Drill Chart

Post by MarkELynch »

Jerry,

Thanks for your comments. The Cleveland chart only lists the typical 75% thread engagement in the table on the right. I have to look up the others in the handbook. Would love to see some photos of your wall chart collection.

Mark

JerryVan
Victor Monarch Special
Posts: 5281
Joined: Mon Aug 24, 2009 3:08 pm
Location: Southeast MI

Re: Cleveland Twist Drill Chart

Post by JerryVan »

Here you go...
DSC06397.JPG
DSC06399.JPG
DSC06402.JPG
DSC06403.JPG
DSC06404.JPG
DSC06405.JPG
DSC06406.JPG

Post Reply