Strawberry Cyclesport :: LAN71 Tools

The LAN71 Wishbone designed by Andy Newlands, Wade Younie and Kirk Pacenti in 2004 is the second generation road wishbone. The first version was designed by Newlands, Damian Bollerman and Stan Heard in 1985 and has been superseded by this 2004 casting design. (Please note: more information on the wishbone kit is in the "Reynolds Store" section.) This 82.5gm hollow investment cast steel wishbone is designed for Reynolds GC1650 (525 quality) 16mm. x 0.7mm x 580mm. single taper seatstays or other 16mm x .6 to .8mm. wall seatstays and the R116 (525 quality) 19.05mm. x 0.7mm x 190mm. top stay material. The wishbone can be used for fabricating rear triangles for road, track or commuting bicycle frames. 3mm. x 1mm. "divots" are cast in for brake bolt drilling for road frames, but can be filled in and filed smooth for track and single speed frames. A 6mm. diameter internal spigot is provided to allow a 5mm. threaded fender boss (lathe drill/tap after brazing the topstay is quite easily done). In the Strawberry "Engineering Lab" the LAN71 wishbone maintained a vertical static proof load of 8.8 kilo Newtons (over one ton) in plane compressive load. The wishbone is priced at $17/ea. for quantities 1-9, $14.20/ea. 10-19pce., $12.15/ea for quantities 20 and up. View this part at the Strawberry workshop/showroom at 1535 S.W. 17th. Ave. and S.W. Market St. in Portland, OR. To order please contact Andy Newlands by email through the Contact link. PayPal and good check accepted.

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LAN71 Cobalt HSS Mitre Cutters. The question of what rpm range is suitable for tube mitreing has come up several times. The answer has several parts - machine rigidity, flood coolant or not, proper feed rate, cutter diameter, tube material hardness, tube gauge, etc., are some of the factors. One place to start to determine a good rpm is to use a surface feet per minute table for drilling - this seems to be conservative even though the chip flow created by a drill bit is not the same as that from a tube mitre cutter. To simplify, let's assume a small mill is used without flood coolant, hand feeding, 1-1/8" (28.6mm.) cutter, 4130 material with a Brinell hardness of 179 and a 0.9mm. wall thickness. Published tables of surface feet per minute (SFM equals the cutter circumference times RPM) for drill bits show a range from 60 to 90 feet/min for material with a Brinell hardness under 200 which 4130 satisfies. RPM equals 3.814 times the SFM divided by the cutter diameter in inches, which for a 1-1/8" cutter gives a range from 200 to 300 rpm. If the material is heat treated and has a Rockwell (RC) hardness number between 35 and 40, the resulting rpm drops to between 100 to 135 rpm. With a little trial a good speed with the parameters unique to the condition will be found.

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LAN71 Head Tube Mill complete with precision ground S7 arbor, 1 M2 HSS facing cutter and 1 M2 HSS reamer to choice (30.0mm for 1" steerers (1-1/4" head tube o.d.) or 33.8mm. for 1-1/8" steerers (36mm. o.d. head tube for lugs or 37mm. fillet)). Design is based on Marchetti machine head tube reamer, but this manual version is produced in the Strawberry workshop. Arbor and cutters are heat treated after blanking out and then precision ground by McKenzie Tool Grinding of Portland, Oregon. Price is $489.00 plus UPS freight. To order, contact Andy Newlands on 503-224-1215 or email through the contact link. October, 2009 - sorry, temporarily out of stock.

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LAN71 Head Tube Mill. "Exploded" view of LAN71 Head Tube Mill (from bottom clockwise) showing drawbar and spring, cutter holder with handles, cutter and arbor with 8mm. fixing bolt, and aligning tube and conical clamp.

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LAN71 Show Stand. Black oxide steel base with aluminum axle complete with two 6mm. button head screws and two steel washers. Base is drilled and counterbored for Allen Head Cap Screws to secure to surface (bolts not included). Price $45/set plus shipping via UPS. View this item at the Strawberry workshop/showroom at 1535 S.W. 17th. Ave. and S.W. Market St. in Portland, Oregon. For sales please contact Andy Newlands by email through the Contact link. PayPal and good check accepted.

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W A R R A N T Y
Terra Nova Cycles, LLC (TNC) warrants to the original purchaser of LAN71 tube mitre cutters that they shall be free from defects in material and workmanship. Please note that like all high speed steel cutting tools the LAN71 tube mitre cutters are brittle by nature. Because of this fact and because the conditions of use cannot be studied by TNC, no refund will be made for broken cutters. TNC's obligation under this warranty is limited to furnishing without additional charge a replacement or, at its option, repairing or issuing credit for any cutter which shall within one year from the date of sale be returned freight prepaid together with a copy of the original invoice to TNC's workshop and which upon inspection is determined by TNC to be defective in materials and workmanship. Complete information as to operating conditions, machine setup, and application of cutting fluid should accompany any product returned for inspection. The provisions of this warranty shall not apply to any LAN71 mitre cutter which has been subject to misuse, improper operating conditions, machine setup or application of cutting fluid or which has been repaired or altered. The cutters are not guaranteed against tooth breakage, but broken teeth, in many instances, can be repaired at cost by sending the cutter directly to McKenzie Tool Grinding Service, 5040 N.W. 112th. Ave. Portland, OR 97220. MTG telephone no.: 503-255-5784; fax 503-253-4076.

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LAN71 mitre cutter extension arbor. The arbor is blanked from 31.7mm. (1-1/4")o.d. S7 tool steel hardened to HRC 56 and then precision ground by McKenzie Tool Grinding. This arbor extends the effective cutting length to more than 130mm. allowing chainstay mitreing in one pass. Arbors are available in 5/8" shank x 5/8" bore, 3/4" x 5/8" and 3/4" x 3/4". The arbors are $147.50 plus shipping from Portland. Please contact Andy by email through the contact page or ring on 503-224-1215.

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LAN71 Head Tube Mill Arbor and Cutters are now in stock. Prices on individual reamers, facers and arbors to follow. Both 30.0mm. and 33.8mm. x 18mm. bore reamers (for 1" and 1-1/8" steerers) and facing cutters with 18mm. bore are available. The cutters are designed to fit the arbor hardened and precision ground from S7 "shock resistant" steel. From top left clockwise: reamer and facing cutter attached to arbor; S7 precision ground arbor; head tube facer; head tube reamer. Each item is available individually as "kit" pieces allowing you to design and build your own head tube mill. The head tube reamers are $165.20/ea. (available in 30.0 and 33.8mm. o.d. x 18mm. ground bore), the head tube facer is $165.20 and has an 18mm. ground bore and a ground 5/16" wide keyway on the top side. The S7 precision ground arbors are $95.30.

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LAN71 Head Tube Mill Arbor and Cutters a little more in focus.

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