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Spindle, Micro Mill, ER-16

Spindle, Micro Mill, ER-16 - Main image
$64.97 $99.95 In stock

Spindle for the ER-16 version of the SX1 HiTorque Micro Mill P/N 4660 and SIEG SX1 Micro Mills. The collet nut side has a thread of M22*15 and using a ER-16 collet P/N 5844 nut holds all ER-16 collets.

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Customer Reviews (4.8 / 5 · 5 reviews)

Hazel ★★★★★

Finally found a direct replacement spindle that fits the SX1 micro mill perfectly – the ER-16 collet nut threading is exactly right. Ran it for a few hours and the runout seems minimal, definitely an improvement over my worn-out original.

Aurora T. ★★★★★

The M22x1.5 thread on the collet nut mates perfectly with my ER-16 collets, and the runout is noticeably tighter than the stock spindle I had before. Swapping it in took under an hour, and the finish on my aluminum parts is way cleaner now.

Ruby ★★★★★

Finally got around to swapping the stock spindle on my SIEG SX1 and this one fits the ER-16 collets without any fuss. The M22x15 thread on the collet nut side engaged cleanly and the whole assembly runs true when I chuck up a 1/8" end mill. Took maybe twenty minutes to install and it’s been solid on