Latest revision as of 06:22, 4 January 2026

These are thousands off the shelf, so need to go open source.

4.5" 8450 TIMKEN BEARING CONE 4.5in ID [1]. $38 [2]
- Cup costs just as much - [3]. Or this - [4]
- Crosses over to SKF, Enduro, NTN, Koyo, etc [5]
Can get 4" automotive bearings for $80 [6]
and 3.75" bearings for $20 [7]

BOM

3" through feed for indexing lathe mill.
Here is the macro - File:Spindleassy.fcmacro and the generating chat [11]. Bearing tapers and cups are shown (bearing in 2 parts). Some hallucination on drive, but in general concept is coming together.
File:Spindlewithconcreteblock.fcstd

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 These are thousands off the shelf, so need to go open source.
 *4.5" 8450 TIMKEN BEARING CONE 4.5in ID [https://www.ironwingsales.com/product/timken-bearing-cone-45in-id-61053/]. $38 [https://www.ebay.com/itm/265477134179]
-**Cup costs just as much - [https://www.summitracing.com/parts/tmk-68709?srsltid=AfmBOoo7EC584Lx8bolhdEPXhi3w4JMSZhSFCDSoBr5hTyI0x6cScgCe]
+**Cup costs just as much - [https://www.summitracing.com/parts/tmk-68709?srsltid=AfmBOoo7EC584Lx8bolhdEPXhi3w4JMSZhSFCDSoBr5hTyI0x6cScgCe]. Or this - [https://www.ebay.com/itm/126510075310]
+**Crosses over to SKF, Enduro, NTN, Koyo, etc [https://www.google.com/search?q=is+there+any+other+company+that+makes+equivalent+cup+or+to+68709+timken]
 * Can get 4" automotive bearings for $80 [https://www.ironwingsales.com/product/timken-bearing-set-4in-id-61875in-od-651400/]
 *and 3.75" bearings for $20 [https://www.ironwingsales.com/product/bower-bearing-bearing-set-375in-id-6in-od-198131/]