router template bushings – why odd sizes?
tony303
| Posted in General Discussion on
I just purchased a 10 piece router template guide kit and can’t figure out why some are odd ball sizes. Examples: 21/32 ID x 3/4 OD, 5/8 ID x 51/64 OD. Why not 1/8,1/4,3/8&1/2 ID for normal size straight or spiral bits? Also why not normal factional ODs. What I really need is a 7/8 OD for use with the 3/8 OD for inlay single template routing using a 1/4 spiral bit, but that size is not included. What gives?
Replies
You should have a 1/2" and 1" which would give you your spacing. Be absolutely sure you get your bit/bushing/router base exactly centered.
Not necessarily a random bunch of rings. PC is not a new company. These rings evolved over many years for many apps.
Whence in a set they look like chaotic randomicity. Stair templets, hinge and door jambs etc, required many strange numbers (diameter, lengths wall thicknesses etc. Bottom line: With so many cutters today and a relatively wide array of rings, a cutter and ring can usually be found to correspond to most offsets.
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