What feeds and speeds should I use on a LongMill?

High Country Tools lists the LongMill in its 'hobby-light' machine class. Use that class's published settings as a starting point and test in scrap.

LongMill feeds and speeds

Machines › Hobby light › LongMill

LongMill feeds & speeds

High Country Tools groups the LongMill in its Hobby light class (source), so ChipLoad uses that class's published settings.

We haven't verified spindle or rigidity specs for the LongMill from a primary source yet, so we don't list any. Set your spindle's real max RPM in the calculator.

See all hobby light settings →

Common starting points (1/8" and 1/4" upcut, downcut, compression)

BitMaterial

Bit	Material	RPM	Feed IPM	Chip load (in)	Makers	Sources
1/4" compression bit	acrylic	125	58.5	0.00234	High Country Tools	[1]
1/4" compression bit	baltic birch plywood	18	64	0.00178	High Country Tools	[1]
1/4" compression bit	dense hardwood (maple, oak)	18	60.6	0.00168	High Country Tools	[1]
1/4" compression bit	epoxy resin	145	43.4	0.0015	High Country Tools	[1]
1/4" compression bit	hardwood	18	67.3	0.00187	High Country Tools	[1]
1/4" compression bit	hdpe / uhmw	115	60.2	0.00262	High Country Tools	[1]
1/4" compression bit	mdf	17	70	0.00206	High Country Tools	[1]
1/4" compression bit	melamine	18	57.2	0.00159	High Country Tools	[1]
1/4" compression bit	softwood	17	73.1	0.00215	High Country Tools	[1]
1/8" compression bit	acrylic	125	27.9–39.6	0.00158–0.00223	High Country Tools	[1]
1/8" compression bit	baltic birch plywood	18	30.5–43.4	0.0012–0.00169	High Country Tools	[1]
1/8" compression bit	dense hardwood (maple, oak)	18	28.9–41.1	0.00114–0.0016	High Country Tools	[1]
1/8" compression bit	epoxy resin	145	20.7–29.4	0.00101–0.00143	High Country Tools	[1]
1/8" compression bit	hardwood	18	32.1–45.6	0.00127–0.00178	High Country Tools	[1]
1/8" compression bit	hdpe / uhmw	115	28.7–40.8	0.00178–0.0025	High Country Tools	[1]
1/8" compression bit	mdf	17	33.3–47.4	0.00139–0.00196	High Country Tools	[1]
1/8" compression bit	melamine	18	27.3–38.8	0.00108–0.00152	High Country Tools	[1]
1/8" compression bit	softwood	17	34.9–49.6	0.00146–0.00205	High Country Tools	[1]
1/4" downcut end mill	acrylic	125	63.8–91.1	0.00182–0.00255	High Country Tools	[1]
1/4" downcut end mill	aluminum	16	35.9	0.00112	High Country Tools	[1]
1/4" downcut end mill	baltic birch plywood	18	69.8–99.7	0.00139–0.00194	High Country Tools	[1]
1/4" downcut end mill	dense hardwood (maple, oak)	18	66.2–94.5	0.00131–0.00184	High Country Tools	[1]
1/4" downcut end mill	epoxy resin	145	47.4–67.7	0.00117–0.00163	High Country Tools	[1]
1/4" downcut end mill	hardwood	12–18	73.5–105	0.00146–0.00359	High Country Tools, Sienci Labs	[1] [2]
1/4" downcut end mill	hdpe / uhmw	115	65.7–93.9	0.00204–0.00286	High Country Tools	[1]
1/4" downcut end mill	mdf	17	76.4–109.1	0.0016–0.00225	High Country Tools	[1]
1/4" downcut end mill	melamine	18	62.5–89.2	0.00124–0.00174	High Country Tools	[1]
1/4" downcut end mill	softwood	12–17	79.8–114	0.00168–0.00359	High Country Tools, Sienci Labs	[1] [2]
1/8" downcut end mill	acrylic	125	36.5	0.00146	High Country Tools	[1]
1/8" downcut end mill	aluminum	16	20.5	0.00064	High Country Tools	[1]
1/8" downcut end mill	baltic birch plywood	18	39.9	0.00111	High Country Tools	[1]
1/8" downcut end mill	dense hardwood (maple, oak)	18	37.8	0.00105	High Country Tools	[1]
1/8" downcut end mill	epoxy resin	145	27.1	0.00093	High Country Tools	[1]
1/8" downcut end mill	hardwood	17–18	42–85	0.00117–0.0025	High Country Tools, Sienci Labs	[1] [2]
1/8" downcut end mill	hdpe / uhmw	115	37.6	0.00163	High Country Tools	[1]
1/8" downcut end mill	mdf	17	43.6	0.00128	High Country Tools	[1]
1/8" downcut end mill	melamine	18	35.7	0.00099	High Country Tools	[1]
1/8" downcut end mill	softwood	17	45.6–85	0.00134–0.0025	High Country Tools, Sienci Labs	[1] [2]
1/4" upcut end mill	acrylic	125	54.7–91.1	0.00182–0.00255	High Country Tools	[1]
1/4" upcut end mill	aluminum	16	30.8–35.9	0.00096–0.00112	High Country Tools	[1]
1/4" upcut end mill	baltic birch plywood	18	59.8–99.7	0.00139–0.00194	High Country Tools	[1]
1/4" upcut end mill	dense hardwood (maple, oak)	18	56.7–94.5	0.00131–0.00184	High Country Tools	[1]
1/4" upcut end mill	epoxy resin	145	40.6–67.7	0.00117–0.00163	High Country Tools	[1]
1/4" upcut end mill	hardwood	18	63–105	0.00146–0.00204	High Country Tools	[1]
1/4" upcut end mill	hdpe / uhmw	115	56.3–93.9	0.00204–0.00286	High Country Tools	[1]
1/4" upcut end mill	mdf	17	65.5–109.1	0.0016–0.00225	High Country Tools	[1]
1/4" upcut end mill	melamine	18	53.5–89.2	0.00124–0.00174	High Country Tools	[1]
1/4" upcut end mill	softwood	17	68.4–114	0.00168–0.00235	High Country Tools	[1]
1/8" upcut end mill	acrylic	125	36.5	0.00146	High Country Tools	[1]
1/8" upcut end mill	aluminum	16	20.5	0.00064	High Country Tools	[1]
1/8" upcut end mill	baltic birch plywood	18	39.9	0.00111	High Country Tools	[1]
1/8" upcut end mill	dense hardwood (maple, oak)	18	37.8	0.00105	High Country Tools	[1]
1/8" upcut end mill	epoxy resin	145	27.1	0.00093	High Country Tools	[1]
1/8" upcut end mill	hardwood	18	42	0.00117	High Country Tools	[1]
1/8" upcut end mill	hdpe / uhmw	115	37.6	0.00163	High Country Tools	[1]
1/8" upcut end mill	mdf	17	43.6	0.00128	High Country Tools	[1]
1/8" upcut end mill	melamine	18	35.7	0.00099	High Country Tools	[1]
1/8" upcut end mill	softwood	17	45.6	0.00134	High Country Tools	[1]

Each row summarizes the published values for that bit and material in this machine class. ⚠ = the maker's chart feed doesn't match its own chip load (see bit page).

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