Thread: bolting down a lathe

You nailed that one,Pete. On April 9 I turned 55 and got up to see the thermometer at -13C, and its been like this since the middle of Octember. You know what they say bout living on the prairies: 6 months of winter and the rest is tough sledding! Anyway, that is why we have heated shops. A while ago the guys down under were talking bout the opposite end of the spectrum, I think my blood is too thick for that. Although I would risk it for a while after this winter, it hasnt been super cold(-32c) or so but it doesnt want to leave.

Originally Posted by smiife

hi guys,
thanks for your suggestions,
i did use 10mm x100mm dyna bolts,and like i said 2 of them stuffed up!!!!!!!!
so i might go back to the drawing board and start again, i might try the chemical ones

next question..............HOW DO I GET THE STUFFED ONES OUT
easier said than done i would imagine
cheers smiife

50 mm penetration into the concrete should have been enough, 75mm would be over kill. The 100mm bolt (assuming the foot is flat and a nominal 3mm plate) would run the risk of punching right thru the concrete and blowing it out.

Sounds like you may have hit some reo. Try moving your lathe 50 mm diagonally if you can and drill again.

The suggestion to blow out the hole is an excellent one.

On pulling out the old dynabolts. You may find the 100mm bolt is a 2 piece sleeve, the main sleeve and a shorter one to make up the length. In this case if the main sleeve is below the surface you will have extreme difficulty removing the bolts.

My first question is do you really need to bolt it down?

My lathe weighs about 70 kg - it sits on a stand of steel that weighs about 30kg....I stack timber on the same stand and I have 4 X 20kg bags of concrete on the shelves.

As a result of all this weight I can't even budge it, let alone have any movement from turning...

So if you have enough weight down low you really shouldn't have much movement....

But hey....what do I know...

My 0.02c worth...