Mandrel size ??

[Pipes]

Will the normal 7mm Mandrel do all pens or do you need to buy diffrent sizes ? I see AZ sells 2 diffrent sizes [?] !!!

 

[vick]

Berea is the only manufacturer that requires a larger mandrel for some of their kits( called a B mandrel). PSI and CSU both only use 7mm. That being said people have reported in the past that PSI 7mm mandrel is a slightly different size than the Berea and CSU.

 

[Pipes]

I bought the adjustable Wooddraft madrel and it seems to work well ! thou I don't have a lot of extra bushings to use as ase spacers so I have to adj it for each kit ! a small PITA !! Do they make just spacer bushings anyone[?] ???

 

[Pipes]

Originally posted by vick
<br />Berea is the only manufacturer that requires a larger mandrel for some of their kits( called a B mandrel). PSI and CSU both only use 7mm. That being said people have reported in the past that PSI 7mm mandrel is a slightly different size than the Berea and CSU.

So I would assume to use berea kits buy there mandrels ???[?]

 

[vick]

The woodcraft mandrel should work fine for CSU and Berea 7mm kits.
I bought some alluminum spacer at home depot they were in the little bins in the screws and nails aisle.

 

[Randy_]

Originally posted by vick<br />Berea is the only manufacturer that requires a larger mandrel for some of their kits( called a B mandrel).

Until about a half hour ago, I would have agreed with you, Vick. But I was just researching a different problem and was looking at the Rockler web site. They are advertising a <b>10 MM MANDREL</b>???

Never heard of that before?? I am going to start a new thread and see if anyone else knows anything about this?? Maybe it is just an error in their web site?? Who knows??

 

[Daniel]

after over three years turning pens. i learned a new things about mandrels just a couple of weeks ago.
Woodcraft sells Berea kits. but does not support the B Mandrel.
so there bushings will fit the 7mm mandrel from P.S.I. and CSUSA no matter how large the pen is.
A 10mm mandrel from P.S.I. woudl be a great Idea though. hope CSUSA catches on.
I realize that different size mandrels makes everyting more complicated. but it would also help make better quality pens.
How does a 10mm mandrel measure up to the Berea B mandrel?

 

[airrat]

Some of the Berea kits take a "B" mandrel with "B" bushings, For example the churchill takes a B mandrel with 16B bushings. What I did was buy an "A" and a "B" mandrel with one 2MT Arbor. I just change it out as needed.

Edited to say, I like the "B" mandrel for its stability, I never have to worry about it bending like the A's.

 

[Rudy Vey]

The "B" mandrel is much more rigid than the "A" mandrel. Although the diameter is only slightly larger, what counts towards the rigidity is the increase of the cross-sectional area. The increase from A to B is 37%, or in more simpler terms more than a third more.
I try to always use the B mandrel and B bushings. If not available, the A bushings can be opened up a bit to make them fit the B mandrel.

 

[alamocdc]

Originally posted by Pipes
<br />I bought the adjustable Wooddraft madrel and it seems to work well ! thou I don't have a lot of extra bushings to use as ase spacers so I have to adj it for each kit ! a small PITA !! Do they make just spacer bushings anyone[?] ???

You can make your own. I've used aluminum tubing, delrin and even a piece of hardwood I've turned down. Just drill a 1/4" hole through it and you're ready to go.