Why don't more manufacturers use standard ER type collets?

[smorgasbord]

I think I know the answer is lock-in (having to buy replacement collets from the manufacturer), but still.

My CNC uses what is essentially a Makita router. Went through trying the Muscle Chuck, but it's extension was too much. Having some bit slipping issues now so probably need to replace the collet. Turns out there are companies making "precision" collets for the Makita, but still, it seems that the collet design is lacking, especially compared to standard ER-11 collets. And they make "ER" type collets in various sizes, too.

I also think collet length matters:
• The Makita precision collets are 16mm long. The standard collets for their trim router are even shorter.
• My mid-size Bosch router has collets that are about 25mm long.
• My big old Porter Cable router has collets that are almost 30mm long.

I guess another question is why router reviewers rarely mention anything about the collets? Seems just as important as where the handles are located. And no-one checks these routers for run-out when reviewing. Sigh.

 

[Mini Me]

ER collets were invented in 1972 so early router manufacturers were forced to design their own solution and possibly they have just carried on from there. I have given up using routers in tables preferring a CNC spindle which use ER collets, far better and way more robust and water cooled spindles are not affected by dust. ER collets come in various sizes and can be changed to suit what you need which is also handy when you combine that with a VFD to vary spindle speed.