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scott johnson
03-01-2005, 10:32 AM
I need two big bits for putting in some holddowns.
First, I need a 1" with a working distance of at least 32".
Second, I need a 3/4" with a working distance of at least 38".
I have a SDS+ hammer and would like to use it, but if not I could rent a SDSmax or SplineDrive. Anyone know where to get these monsters.
thanks
Tom R
03-01-2005, 11:27 AM
Go to http://www.mcmaster.com/

They got 'em.
scott johnson
03-02-2005, 06:13 PM
McMaster-Carr sells long SDS+ bits, but none of their 3/4" or 1" bits are long enough for my appliction. I have recently found a company that does custom order rotary bits. They (KK Industries) sell a 3/4" x 38" for $101 and a 1" x 38" for $146. Pricy, but still much less than paying $300 each for Hilti bits.
Tom R
03-02-2005, 07:04 PM
McMaster Carr

3/4" spline-shank, 3/4" bit, 36" working depth, carbide
part # 8783A81 $90.67

3/4" spline-shank, 1" bit, 36" working depth, carbide
part #8783A51 $118.04
bkrahmer
03-02-2005, 08:13 PM
Correct me if I'm wrong, but spline shank is not the same as SDS. I used a big Makita once that used what I would call a spline-shank bit. They were definitely different than the Bosch SDS bits at HD.
scott johnson
03-03-2005, 02:48 PM
Yes, spline is definitely differnet than SDS. In addition, there are two kinds of SDS - one is called plus and one is called max. If I had understood all of this more when I purchased the SDS+ I probably would have forked over the extra bucks for spline - since it is generally easier to get thicker and longer bits.
Tom R
03-03-2005, 08:05 PM
Correct me if I'm wrong, but spline shank is not the same as SDS. I used a big Makita once that used what I would call a spline-shank bit. They were definitely different than the Bosch SDS bits at HD.

His first post mentions 'spline-drive' as an option.
bkrahmer
03-03-2005, 11:07 PM
Sorry, Tom, didn't mean to yell at you or anything. I missed the point about being able to rent something. They gave me any bit I wanted when I rented the drill. Why not just do that? Certainly cheaper...
scott johnson
03-04-2005, 09:33 AM
I would love to just rent the hammer and/or bits, but upon further research I have discovered two problems. First, none of the rental yards around me rent anything that long. Second, although I can purchase spline drive bits this long, all the spline drive hammers themselves seem to be too wide to fit in the tight space I have. I am going to purchase the custom bits at KK industries. Thanks for all your feedback!