Masonry Drill Speed? - Building & Construction - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction


Thread Tools Display Modes
Old 06-14-2013, 04:37 PM   #1
Join Date: Jan 2013
Posts: 836
Rewards Points: 992

masonry drill speed?

I need to drill some 1/4 and 7/8" holes in 4in concrete blocks using a36v hammer drill. I have a cheap 1/4 bit and an expensive 7/8.

What speeds are best?

I drilled a 7/8 first and was surprised a how easy it was on slow. I then did a 1/4 and it wouldn,t drill at all. I incrased the speed and it improved dramatically. I don't know how good it was for the bit, but I did the other 5 holes on high. Was that right?

I have 6 7/8 to drill. What speed do I use?


Toller is offline   Reply With Quote
Old 06-14-2013, 05:02 PM   #2
Exterior Construction
Windows on Wash's Avatar
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 16,312
Rewards Points: 5,558
Blog Entries: 5

Most good rotary hammers (i.e. not the ones that are on standard drills) are low speed rotationally and good on the vertical hammer action.

If you go too fast on the common 3 and 1 drills, the hammer is more like noise than a true deliverable of force.


Windows on Wash is offline   Reply With Quote
The Following 2 Users Say Thank You to Windows on Wash For This Useful Post:
Willie T (06-14-2013), woodworkbykirk (06-14-2013)
Old 06-14-2013, 06:57 PM   #3
Architectural Sculptor
RWolff's Avatar
Join Date: Jan 2013
Location: USA, Midwest
Posts: 766
Rewards Points: 502

You don't want to run the bits at any fast speed- they'll get hot very fast and that's the end of them, slow and steady is the best speed.
RWolff is offline   Reply With Quote
Old 06-14-2013, 07:01 PM   #4
Remodel and New Build GC
Join Date: Sep 2010
Location: Colorado @ 7651'
Posts: 5,506
Rewards Points: 3,790

Keep them wet..... I usually just take a plastic milk bottle... punch a hole in the bottom.... and let it "pee" on the bit

Seems different substances like different drill speeds.... I guess that my Boshe Bulldog and most all drills are variable speed.
Never stop learning (xcep fer speling en typeing)
MTN REMODEL LLC is online now   Reply With Quote
The Following User Says Thank You to MTN REMODEL LLC For This Useful Post:
woodworkbykirk (06-14-2013)

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Should have bought a hammer drill Ultrarunner2017 Concrete, Stone & Masonry 5 03-16-2012 11:07 PM
Fujitsu Ductless AC "Fan only" speed problem? chiefswabjockey HVAC 0 03-07-2012 10:21 AM
Help me choose a power drill morph999 General DIY Discussions 18 06-17-2010 07:17 PM
Rookie needs advice - How to remove old thinset from concrete floor? rookie floor layer Flooring 9 10-04-2009 12:01 PM
Bosch GSB 16 RE drill Coxy Tools 0 05-28-2009 01:46 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1