General information for drilling and tapping cast iron
CK5
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want to drill and tap boss on np205
- Thread starter 14-Bolt
- Start date
I can check my bolt length later today.
Please do, thanks
This is what I need? It says bottom finishing tap. This one is tapered and they have one that isn't
Drill America 5/8 in. - 11 Carbon Steel Taper Hand Tap DWTT5/8-11 - The Home Depot
Drill America Hand Taps. Hand Taps are the most versatile taps for hand use or for tapping under power. Hand threading tap is popular for use in general machine tapping or CNC tapping. This is also appropriate
www.homedepot.com
Drill America 5/8 in.-11 Carbon Steel Bottoming Hand Tap (1-Piece) DWTB5/8-11 - The Home Depot
Drill America Hand Taps. Hand Taps are the most versatile taps for hand use or for tapping under power. Hand threading tap is popular for use in general machine tapping or CNC tapping. This is also appropriate
www.homedepot.com
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I sound this for bolt size, correct
The tapered tap is used to start and tap open(pass through holes) It is best to start and mostly finish a blind hole with a tapered tap. Then use the finish tap to cut all the way to the bottom. If the hole is deep enough that the bolt will not get to the bottom 3 or 4 threads you can skip the finish tap.
I have never started new threads with a finish tap, I think it would be very difficult to start them straight
I have never started new threads with a finish tap, I think it would be very difficult to start them straight
So get both?, the bolt length is pretty short. I think the non tapered one would be ok. Like the one that comes with the drill bit
Ideally, someone with a 205 that has the holes could stick a toothpick in there or something and let me know how deep that holes goes. Then I would know exactly what length to drill into and the proper tap to be used.
If you use 1-1/4 corse thread bolt, possibly that hole is 1-1/2 deep type of thing.. so the tap above in the set would suffice
Ideally, someone with a 205 that has the holes could stick a toothpick in there or something and let me know how deep that holes goes. Then I would know exactly what length to drill into and the proper tap to be used.
If you use 1-1/4 corse thread bolt, possibly that hole is 1-1/2 deep type of thing.. so the tap above in the set would suffice
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Remember, that’s the bolt length not the hole depth. Part of the bolt length will be eaten up by the thickness of the bar and a lock washer.
Yes... I'm going to drill 3/4 which seems to deep, and see where I'm at. Maybe 1/2 inch but that doesn't seem deep enough.
I've looked all over online and can't find the actual depth of the hole on 205 for that bolt
I have one laying in the driveway, I’ll go measure it
You are only looking at the external boss only - there is also an internal boss as well.
Also, just as Wes stated the bottom/finishing tap is for just what the name implies and the starting tap name is called that for a reason - use both at the appropriate times and all will be well.
Yes... I've seen one pic of the inside from the guy who just drilled all the way through the 205 to mount the strut rod.
Haha. Well, at least for whomever needs this info it will be in this thread, instead of all the place where I've had to look. Hahahaha
Ordered the drill bit and both taps...
Haha. Well, at least for whomever needs this info it will be in this thread, instead of all the place where I've had to look. Hahahaha
Ordered the drill bit and both taps...
Just for reference this case is a non drilled unit from my beloved old 77 K/10 that had a 465 in front of it - It had a build date of August and so did the truck; must have been cutting production delivery times real close.
This is a ‘72 housing
I will say this topic has taken me all over the net. Even to the way back ck5, it is interesting seeing familiar names and ones not known at all. When clicking on their profiles a lot of people are long gone and haven't posted in many years..
Here is one
ck5.com
Here is one
How many have a transfer case brace?
Just curious how many people have the brace for the transfer case? I have a '84 CUCV with the TH400 & NP208 and it doesn't have a brace. I see the threaded holes for it on the transfer case. I also had a '75 K5 with TH350 & NP203 and it didn't have one either. How common is it? and...
ck5.com
Brother...!!!! Thanks a million. You may have shaved a few more pages off this thread with that info.
Hahaha, your welcome. I’ve been following along and meaning to get under there for ya.
I can’t get a perfect read with stuff in the way but by eyeball this is the hole spread I’m seeing.
1.5” bolt, hole is 1 1/8” deep,
With no support rod the bolt bottoms out with this much sticking out.
