used anchor made of truck rotors not holding

[crabsfearme]

My new trotline anchors I made out of 20 pound truck rotors were not holding.  It was in an area with current but not that strong.  When I went to tighten the line it would never get really tight where I had to pull really hard.  Felt like the flat rotor was just sliding along the bottom.  I heard that rotors were suppossed to make good line anchors.  Any thoughts?  I was thinking of bolting on some angle Iron at a 90 degree angle to help the rotor dig in.

[Mr. Ray III]

Not enough scope or you're on a sandy bottom and its sliding. 

[shtoong]

I had brake rotors slide in sand and mud. It's a smooth surface so if it laying flat it will slide like a hockey puck on ice. I know people use them and they must work for some. I found using a danforth for your first anchor works well. They can be fairly small (4 Lb.) Once they grab they hold tight. I use a decent weight bell anchor on the end.

[Stabilizer]

I have some 10 lug monsters (heavy as [Sam Hill] and I would rather not have them), will trade for 8 lug or heavy 6.  Using 50-100' lines will really help.  One others tip I got from Mr Ray couple years ago was to use a float line to the anchor to help tighten them up.  If you aren't using one, I can highly recommend it.  Helps for a number of reasons.

[Mr. Breeze]

A couple of 6" long pieces of all thread rod will solve you problem, if your lines are long enough and you still have problems holding

[lone sailor]

I have some flat lead discs about the size of a rotor with rebar in them, similar to what you are thinking of making i believe.. They dig into anything but can be a little harder getting out. To be honest a river anchor from walmart 15-18 pound works just as well and doesn't rust in your boat.

[Harford Crabber]

I had trouble with rotors slipping once in awhile but every since I added the eyebolt they been holding pretty good.   I like them because they and the taglines fit in a milkcrate nicely.  My buddy has the 15lb mushroom anchors that are nicer because they are vinyl covered.  I guess it all depends on how much ya wanna spend.  He accuses me of having moths fly out every time I open my wallet....

[Hoffa]

I tried using rotors and they never held with an eyebolt.  They would drag across the mud bottom like a sleigh.  Danforth were not much better.  I just made a change to the rotors by adding a loop of 3/8" all thread rod.   Hopefully they will tilt and dig into sand or mud much better.  Going to try them this weekend.  They only weigh 17 lbs.

[Crabslayer]

Bolt 2 rotors together then tie your line in the center groove that is created from bolting together.  When done crabbing you can then wrap your line in the center for easy storage.  with this meathod the rotors do not have to be large.  You can use 2 (total of 4) from a small car.