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Gelbster · 02-12-2017, 08:16 AM

I agree.
I do not recall any Posts about a failure of a roller bearing IMSB. An impressive rebuttal to those of us (me inc.)who were skeptical about the concept as first offered. The first version of the roller bearing IMSB was quickly modified to address the objections about lack of thrust control. This success has been acknowledged several times in the past.Jake has a given his 'benediction' to the design -RND sells it. Dual Row RND Roller Bearing IMS Retrofit kit - RND Store LN Engineering
These roller bearing IMSB kits all(AFAIK) have are *-1RS= rear seal(just like the deep groove ball bearing kits) so the IMS tube will not accumulate foul oil behind it.There must be a reason for the 1 seal?
JFP has also commented on the IMS tube retaining old oil.
The variant that intrigues me and may spawn many pages of hysteria is a roller bearing IMSB kit with DOF. I suggested it on Pedro's Forum - into the Lion's Den ! He would not even discuss it. Which says a lot.Even if the Roller bearing IMSB +DOF kit has no technical merit, it could be a good marketing gimmick :-).

02-12-2017, 08:16 AM	#2
Gelbster Registered User Join Date: May 2014 Location: S.California Posts: 2,029	I agree. I do not recall any Posts about a failure of a roller bearing IMSB. An impressive rebuttal to those of us (me inc.)who were skeptical about the concept as first offered. The first version of the roller bearing IMSB was quickly modified to address the objections about lack of thrust control. This success has been acknowledged several times in the past.Jake has a given his 'benediction' to the design -RND sells it. Dual Row RND Roller Bearing IMS Retrofit kit - RND Store LN Engineering These roller bearing IMSB kits all(AFAIK) have are *-1RS= rear seal(just like the deep groove ball bearing kits) so the IMS tube will not accumulate foul oil behind it.There must be a reason for the 1 seal? JFP has also commented on the IMS tube retaining old oil. The variant that intrigues me and may spawn many pages of hysteria is a roller bearing IMSB kit with DOF. I suggested it on Pedro's Forum - into the Lion's Den ! He would not even discuss it. Which says a lot.Even if the Roller bearing IMSB +DOF kit has no technical merit, it could be a good marketing gimmick :-).