Removal of enamel from ultrafine monofilamentary wires

Review of Scientific Instruments

Volumn 75, Issue 5 PART 1, 2004, Pages 1169-1174

  Walker, I R ^a  

^a UNIVERSITY OF CAMBRIDGE   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

DISSOLUTION; ELECTRIC INSULATION; ENAMELS; FRICTION; LASER BEAMS; STRIPPING (REMOVAL); THERMAL EFFECTS; WHEELS;

DISSOLUTIVE CHEMICALS; FRICTION WHEELS; LASER RADIATION; ULTRAFINE MONOFILAMENTARY WIRES;

ELECTRIC WIRE;

EID: 3042545198     PISSN: 00346748     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1666992     Document Type: Article

References (24)

1. If the conductor is made of copper, this is normally referred to as "magnet wire." Ultrafine wire (of whatever material) is normally defined as that which has a diameter of less than 46 μm .
2. In his chapter on Cryostats for Storage Dewars, D. G. Cahill writes, "Inevitably some of the [cryostat] wires will short or break and the extras [spare twisted pairs] will be needed." While this remark may be unduly pessimistic, it does indicate the level of frustration felt by many low-temperature researchers about this problem. [See: Experimental Techniques in Condensed Matter Physics at Low Temperatures, edited by R. C. Richardson and E. N. Smith (Addison-Wesley, New York, 1988), p. 40.]
3. Wires with some of these insulations can be obtained in small quantities from: Molecu Wire Corporation, P.O. Box 495, Farmingdale, New Jersey 07727 [http//:www.molecu.com] and Polyfil AG, Oberallmendstrasse 20A, CH-6300 Zug, Switzerland [http//:www.polyfil.ch].
4. The abrasion resistance of Formvar can be inadequate in some cases. In his chapter on Electric and Magnetic Isolation [Experimental Techniques in Condensed Matter Physics at Low Temperatures, edited by R. C. Richardson and E. N. Smith (Addison-Wesley, New York, 1988), p. 149], R. S. Germain writes, "One helpful technique used to avoid shorts [involving wires in cryostats] is to thread twisted pairs through #30 Teflon spaghetti (alpha tubing) before inserting into Cu-Ni capillary. The formvar insulation on most of the wire we use is fairly fragile and the process of drawing the pair through metal tubing will almost certainly rub off the formvar if this precaution is not taken." Germain goes on to suggest the use of "superpolythermaleze" [sic] or ML insulations: "We may switch over to using superpolythermaleze or duPont ML insulation some day because it is tougher stuff, but formvar insulated wire is more commonly available and formvar is much easier to remove.
5. These insulations, under the trade names "Armored Poly-Thermaleze 2000," "Poly-Thermaleze TW," and "Thermaleze Q TW," are made by PD Wire & Cable, One Technology Center, 2131 S. Coliseum Blvd., Fort Wayne, IN 46803 [http//:www.pdwireandcable.com/home.cfm].
6. For example: Lake Shore Cryotronics, Inc., 575 McCorkle Blvd., Westerville, OH 43082 [http//:www.lakeshore.com].
7. This product was known by the trade-name "Strip-X."
8. Available from: The Eraser Company, Inc., P.O. Box 4961 Oliva Drive, Syracuse, New York, 13221-4961 [http//:www.eraser.com].
9. The author is indebted to G. G. Lonzarich for providing this information.
10. Available from: Sigma-Aldrich Company Ltd., The Old Brickyard, New Road, Gillingham, Dorset, U.K. SP8 4BR [http//: www.sigma-aldrich.com].
11. According to R. J. Lewis, Sr.'s Sax's Dangerous Properties of Industrial Materials, Eighth Ed., Vol. II (Van Nostrand Reinhold, New York, 1992), pp. 53-54: "When heated to decomposition it [aspirin] emits acrid smoke and fumes." The reference also lists potential problems caused by exposure of the eyes and respiratory system to this substance.
12. W. W Pendleton, Magnet Wire, in Encyclopedia of Materials Science and Engineering, Vol. 4, edited by M. B. Bever (Pergamon, New York, 1986), pp. 2642-2645.
13. J. H. Brannon, A. C. Tam, and R. H. Kurth, J. Appl. Phys. 70, 3881 (1991).
14. H. Endert, R. Patzel, and D. Basting, Opt. Quantum Electron. 27, 1319 (1995). This article contains a very good electron micrograph of a 50-μm-diam wire that has been stripped using the photoablative method.
15. H. Endert, M. Scaggs, D. Basting, and U. Stamm, J. Laser Appl. 11, 1 (1999).
16. An example is the RT2S device, made by the Eraser Company (see Ref. 8). A smaller "portable" machine (weighing about 900 g) called the "ST1" has recently been introduced by this firm. Bench-top machines are also made by: Carpenter Mfg. Co., Inc., 110 Fairgrounds Drive, P.O. Box 188, Manlius, NY 13104-0188 [http//:www.carpentermfg.com].
17. See, for example, Comco Inc., 2151 N. Lincoln Street, Burbank, CA 91504-3344 [http//:www.comcoinc.com].
18. This is about the background sound level in a large office.
19. A 1524T009SR-277 dc motor with preloaded ball bearings, from: Dr. Fritz Faulhaber GMBH & Co. KG, Daimlerstraße 23, 71101 Schönaich, Germany [http//:www.faulhaber.de].
20. In our own commercial bench-top stripping machine, the wheel rotational speed is 13 800 rpm.
21. The grease (Kilopoise 0868S) is called a "damping lubricant," and is based on high viscosity synthetic hydrocarbons thickened with fumed silica. Available from Rocol Lubricants, Rocol House, Swillington, Leeds, LS26 8BS United Kingdom [http//:www.rocol.com/lubricants/].
22. Part number AE0081 "Fybrglass cone wheel," available from: Eraser Company, PO Box 4961 Oliva Drive, Syracuse, NY 13221-4961 [http//: www.eraser.com].
23. Part number AE0095 "Fybrglass cone wheel" (see Ref. 22).
24. These consist of a coarse fabric (perhaps fiber glass) mesh coated with abrasive (perhaps silicon carbide) powder. Part number AR3020 (see Ref. 22).