550 Primer Track Bearing
550 Primer Track Bearing
OEM Primer Track Bearing - Showing Worn EdgePrimer Track Bearing on Press - View from Beneath Primer Bar
Click to enlarge image(s)
The UniqueTek 550 Primer Track Bearing has a 1.4″ extension that supports the primer bar better. This extended support prevents the primer bar from "drooping" and binding while its in the "out" position.

Nicklon™ Nickel/Teflon Plating
Our Primer Track Bearing features Nicklon™ … a co-deposition of Electroless Nickel & PTFE (Teflon™). This yields a excellent lubricity, high wear resistance and very low coefficient of friction (0.10). This makes it the slickest primer track bearing there is!

NEW! Double Disk Ground
The UniqueTek 550 Primer Track Bearing is now Double Disk Ground. This process yields a superior flatness and parallelism between the top and bottom surfaces as well as a very uniform surface finish. The surface finish is better than 40 microns.

1.4″ Longer than OEM Bearing
Laser Cut from Mild Steel
 Double-Disk Ground to a Surface Finish Better Than 40 micron.
Nicklon™ Plated
Simple Drop-in Installation

Easy "Drop In" Installation
The UniqueTek 550 Primer Track Bearing is a drop-in replacement for the original Dillon Primer Track Bearing (part #14015) and takes just minutes to install. Fits all 550 press models including the new 550C.

Will NOT fit the primer system of the new XL 750 press.

Customer Feedback
"I bought the 550 Primer Track Bearing and it works great. Since I installed it, primer insertion is much easier, with no crushed primers." — Robert S. - Renton, WA (4/7/16)

"In my estimation, the primer system causes the most problems on the 550. I loaded 300 today and the primer bar did not jam one time! I believe you have made an improvement. Before long, I'm going to have more invested in your improvements than the original press." — Harvey S. - Santan Valley, AZ (12/22/15)

TEFLON is a trademark of THE CHEMOURS COMPANY FC, LLC. Made in USA Logo

Customer Reviews

Average rating from 7 reviews: 5.0 Showing: 3 of 7 Show All
100% More Reliable Primer Feed!I installed a UniqueTek 550 Primer Track Bearings on both of my Dillon 550’s. Primer feed is now 100% more reliable. Thanks for a great product. Written by Bill Garland on Thu 10 Mar 2022 3:14:36 PM GMT
550 Primer Track BearingDo yourself a favor, buy one of these. It will turn your 550 Dillion reloader from a Cheverolet to a Ferrari. Great product. Highly recommend. JB Written by Jim Bandy on Tue 4 Aug 2020 9:51:11 PM GMT
OMG! Worth every cent!After a long loading session featuring multiple launches of primers from the ever sticky primer bar, I had enough. Loss of pace, the launching of untold numbers of primers over the years, not to mention the frustration with my wonderful 550 machines, something needed to change. I was more that a little hesitant to spend money on a funny looking piece of metal, but I am so glad I did. I have now loaded thousands on this new bearing track with Zero issues. Slick as a greased pig on a hockey rink. Works every time. Worth every cent. Written by Eric Staedicke on Mon 11 May 2020 7:42:04 PM GMT
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