Bosch Chopping Gun

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I have an old Bosch chopping gun Model #0611 291 134 that I'm trying to find bits for. My last chopping bit broke and I haven't' been able to find a replacement. I even went to a tool supplier and they didn't have any either. Part of the problem is that no one seems to know what type of bit this is. Modern bits are SDS, SDS-Max, Spline, Etc. This gun uses a 3/4" hex shank bit with a machined round end and a flat groove for the bit holder. Here's a photo of the last bit that I have.

 

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Are the shanks on these bits what you are looking for?

Whoops, we couldn't find that.

 

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McMaster-Carr says the following about the bits at the link below:

"These chisel bits have a combination round and hex shank that works with spline-drive rotary hammers."

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

A drawing of one of their bits:

https://www.mcmaster.com/mvC/Library/CAD1/20250507/A46D8E85/28645A51_Chisel%20for%20Rotary%20Hammers.PDF

 

[infinity]

Thanks. It seems that these are called Spline/Round Shank Hex bits. Once I figured that out I was able to find them on Zoro for $15 each so I ordered two

 

[infinity]

Ordered two from Zoro. Two day delivery all good. Thanks for the help.

 

[Little Bill]

We call them chipping bits. Never heard them called chopper bits.

 

[infinity]

We call them chipping bits. Never heard them called chopper bits.

Me neither.

 

[Little Bill]

Me neither.

My last chopping bit broke

 

[Eddie702]

Same bits I have. I have a Milwaukee spline bit rotary hammer and it takes those same bits. Its old and I bought it on E-bay years ago its pretty beat. I used it to often for driving ground rods with no adapter and I think that killed it. Motor runs but it broke something inside. probably could fix it but parts are not available for the old drill.

I was looking for spline bits for it 10 years ago in HD and all they had was SDS stuff.

The HD 'tool expert" told me they didn't make spline stuff anymore LOL