Large Drill bit for steel rod bracing approx 1.5m trunk

[dumper]

The American framers use a 1/2 or 3/4 impact driver to drill deep holes sds will either slip or break your wrist 

[MattyF]

I use a petrol stihl for bracing and fencing… as all ready said slow and steady and keep cleaning the auger 

[Stubby]

6 minutes ago, dumper said:

The American framers use a 1/2 or 3/4 impact driver to drill deep holes sds will either slip or break your wrist 

Ok .

[doobin]

13 minutes ago, Stubby said:

Thats ok but wouldn't the SDS Milwaukee Fuel ( that I have ) M18 CHD be better . The Hawg has a key chuck where as the SDS Max fitting would not slip . ? 

No, any drill bit (such as an auger) that will be tranmitting a lot of torque comes with a hex shank.

 

The SDS is designed for percussive works, not so much torque. It also has a clutch in there that will slip easily, as anyone who has got a little trigger happy boring a large diameter hole through concrete will attest to.

 

The high torque drills come with very long brace bars to help you hang on!

 

@dumpergot a link to that? An impact wrench or driver produces jolts of torque, for loosening tight machine threads. Sustained torque is what you need for drilling (and installing coach screws/timberlocks! although the impact motion can be helpful in preventing cam-out here)

[dumper]

Grandson works as chippy in Oregon uses picture below also has a Bosch impact with splined drive to take auger bits builds log cabins and outdoor structures

[spuddog0507]

1 hour ago, doobin said:

An SDS is totally the wrong drill for the job. You need a low geared high torque drill like oak framers use. I have the Milwaukee variant.

 

Milwaukee M18FRAD2-0 M18 FUEL SUPER HAWG 2 Speed Right Angle Drill Driver Bare Unit

FFX.CO.UK

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The Milwaukee M18FRAD2 is a 18V FUEL Super Hawg, 2-speed, 2nd generation right angle drill driver. Ideal for...

 

I am hardly going to go and spend £360 on a drill and another what £60-£70 on a battery and charger to drill 2 holes, it was just a one off project that I did and managed to do it , OK first SDS drill burnt out but it came to me free of charge as it was left under a bed in a rental property I helped clear out, new one I bought was a hokicoki or what every there called,, but I am a big believer in having the right tool for the job and if it was something I was doing regular I would not think twice about spending the money on the right kit fir the job,,