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Pipe Making: Difference between revisions
→Drills for stems
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#Standard Silver&Deming bits work great too, especially if your following a previously drilled drought hole. The main drawback is the end of your tenon will need to be rounded to match the bottom of the mortise. | #Standard Silver&Deming bits work great too, especially if your following a previously drilled drought hole. The main drawback is the end of your tenon will need to be rounded to match the bottom of the mortise. | ||
==== Drills for stems ==== | ==== Drills for stems ==== | ||
6" long tapered bits are excellent | 6" long tapered bits are an excellent choice for drilling out stem rod. 4mm, 5/32", and 9/64", and 1/8" are popular choices, depending on design preferences. These are stopped around 3/4" short of the bit end and followed up with a smaller bit that will facilitate thinning out the bit. Popular choices here for this section are HSS S7D bits in 1/16", or 2mm diameters, with some pipe makers going as small as 1 mm here. 6" long "aircraft bits" enable this portion to be drilled from the same end as the rest of the air hole, or the rod stock can be flipped around and drilled from the other end with a shorter bit with proper alignment such as can be achieved with a self centering chuck or vice. | ||
==== Forstner bits ==== | ==== Forstner bits ==== | ||
[[Image:forstner.jpg|thumb|Forstner bit]]Forstner bits, named after their inventor, Benjamin Forstner, bore precise, flat-bottomed holes in wood, in any orientation with respect to the wood grain. They can cut on the edge of a block of wood, and can cut overlapping holes.[http://en.wikipedia.org/wiki/Drill_bit#Forstner_bit] In pipe making Forstner bits are often used for facing operations while making shanks and stems, and can also be used for facing the top of the bowl. Many pipe makers also use them for drilling the mortise, providing a smooth flat bottomed hole that facilitates a precise tenon to mortise fit. | [[Image:forstner.jpg|thumb|Forstner bit]]Forstner bits, named after their inventor, Benjamin Forstner, bore precise, flat-bottomed holes in wood, in any orientation with respect to the wood grain. They can cut on the edge of a block of wood, and can cut overlapping holes.[http://en.wikipedia.org/wiki/Drill_bit#Forstner_bit] In pipe making Forstner bits are often used for facing operations while making shanks and stems, and can also be used for facing the top of the bowl. Many pipe makers also use them for drilling the mortise, providing a smooth flat bottomed hole that facilitates a precise tenon to mortise fit. | ||