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Torsion Spring Series Selection to Match Your Needs

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Torsion Spring Series Selection to Match Your Needs TORSION SPRINGS Torsion Spring Series Selection to Match Your Needs Lee Spring’s Torsion Springs have been carefully designed to represent the most commonly used specifications in both inch and metric sizes. The Torsion Spring selection is divided into seven categories by Free Position of Legs (90˚, 120˚, 180˚, 210˚, 270˚, 300˚, 360˚) and both left-hand and right-hand wound springs are shown. Direction of Wind: Good design dictates that torsion springs should be used in the direction that winds the coil. When ordering, select either LTL (left-hand wound) or LTR (right-hand wound) for required application. 90˚ 120˚ 180˚ 210˚ 270˚ 300˚ 360˚ TORSION Mandrel Size: SPRINGS Generally, torsion springs are used over a mandrel (shaft or arbor). The column “Suggested Mandrel Size”, allows approximately a 10% clearance for the various deflections shown in examples below. If you require greater deflection, a reduction in mandrel size is suggested. Lee Spring can manufacture custom torsion springs to your specifications. Contact us today! leespring.com • Call: 888-SPRINGS (888-777-4647) • Fax: 888-426-6655 285 TORSION SPRINGS General Notes 1.Lengths of legs are shown as “A” in sketches below. 2.It is to be noted that “R” (radius in inches) where force is applied is always 1/2 of “A” (Length of Leg). Dotted lines of legs show loaded position where values of “T” (Torque) will be achieved at “R” (Radius). 3.To translate torque values to direct load: Use Formula P=T/R P=LoadappliedatRadius(R),T=Torque Example: Part LTL 012A01 What is the load where R = .187? Using P = T/R = .050/.187 = .267lbs. 4.To calculate torque values other than those listed, a direct proportion may be used. Example: Part LTL 012 A01 Torque shown in catalog listing is .050 inch-lbs. for 90° deflection (for Music Wire); therefore, torque at 45° deflection would be .025 inch-lbs. 5.Inspection of Load – Loads should always be checked at the Radius (“R” value). Tolerances on Outside Diameter Specifications Inches Millimeters Material: .093" –.125" ±.004" 2.36 –3.17 ±.10mm •MusicWire .126" –.200" ±.005" 3.18 –5.08 ±.13mm •302StainlessSteel .201" –.300" ±.007" 5.09 –7.62 ±.18mm •316StainlessSteel .301" –.410" ±.010" 7.63 –10.41 ±.26mm Plating: .411" –.500" ±.013" 10.42 –12.70 ±.33mm Zinc Plated .0002” .501" –.700" ±.015" 12.71 –17.78 ±.38mm TORSION SPRINGS (ASTM B-633) .701" –.875" ±.020" 17.79 –22.23 ±.51mm Torsion springs of wire size 0.025” and .876" –1.125" ±.025" 22.24 –28.58 ±.64mm less may be furnished using pre-coated wire at Lee Spring’s discretion without 1.126" –1.218" ±.030" 28.59 –30.94 ±.76mm supplemental zinc plating. 1.219" –1.250" ±.035" 30.95 –31.75 ±.89mm Passivation: 1.251" –1.360" ±.040" 31.76 –34.54 ±1.02mm (ASTM A-967) 1.361" –1.520" ±.045" 34.55 –38.60 ±1.14mm (Mil. Spec. No. QQ-P-35) 1.521" –1.750" ±.050" 38.61 –44.45 ±1.27mm (Type 316 Stainless also 1.751" –2.000" ±.055" 44.46 –50.80 ±1.40mm ultrasonically cleaned) Over 2.000" ±.060" Over 50.80 ±1.52mm Tolerances on Torque: ±10% Tolerances on Free Position From 3 to 10 total coils (Incl.) ± 10° • From 11 to 20 total coils (Incl.) ± 15° 286 leespring.com • Call: 888-SPRINGS (888-777-4647) • Fax: 888-426-6655 TORSION SPRINGS Torsion Spring Series Guide to using tables Lee Stock Number: Wire Diameter: Radius: Length Of Leg: Price Group: Lee Spring Part Number, Wire diameter of Suggested contact point The leg length Reference for add suffix M for Music spring wire. for load and torque measured from the price list. See fold-out Wire, S for Stainless inspection, typically at body's centerline section at rear of book. Steel or S316 for Type 1/2 of A (length of leg). to end of leg. 316 Stainless Steel. (// -'+,*)/ *./ +-.'/ .&)*', ,'%%/,+/) (/#%+ -) #'$/. .*/ %.-' ,+- )*&$/+/. )*&$/+/. )/(/+*-# !+ !. $&#)./( - (/% (/#%+ - $ #'$/. !,"" " ,*/ !& &.- !( -*(, " ," ," IN. MMIN. MMIN.-LB. KG-MMIN. MMIN.MMIN. MMIN. MMM S S316 LTL028E 07 1/4 .373 9.47 .028 .71 .550 6.34 .500 12.70 6.35 1.000 25.400.091 2.312.25 J K AB LTR028E 07 (.250) LTL038G 01 .386 9.80 .038 .97 1.280 14.75 .62515.88 1.250 31.750.170 4.323.25 K L AD LTR038G 01 17/64 6.75 LTL048J 01 (.266) .388 9.86 .048 1.22 2.750 31.68 .62515.88 1.250 31.750.260 6.604.25 L M AG LTR048J 01 LTL030F 07 .398 10.11 .030 .76 .680 7.83 .500 12.70 1.000 25.40 0098 2.49 225 L M AC LTR030F 07 2 1 Outside Diameter: Torque @ 'X' Deflection (T): Suggested Mandrel Size: Body Length Number Of Coils: Spring body outer Design torque load to rotate the Suggested rod size to guide the Approx.: Total coils in the spring. diameter, parts listed in spring to its maximum suggested inside of the spring, allowing for Overall length of the ascending order. deflection, noted by 'X' degrees to manufacturing tolerances and spring coil body. avoid loading overstress. working to maximum deflection. Larger mandrel sizes may work with reduced working deflection. How to Determine Price TORSION 1. Select the spring you want by LEE STOCK NUMBER. 2. Read across to the last column PRICE GROUP to obtain the price code: when applicable, select the price code that corresponds to the material type required. 3. Refer to the PRICE GROUP in the appropriate pricing chart by SPRINGS spring type located in the back of this catalog for pricing up to 199 pieces of an item. 4. Prices subject to change without notice. FREE SHIPPING AVAILABLE See Price List in back of catalog for details. leespring.com • Call: 888-SPRINGS (888-777-4647) • Fax: 888-426-6655 287 TORSION SPRINGS: 90° FREE POSITION (INCH) Music Wire (Plated**) or 302 Stainless Steel* (Passivated) or 316 Stainless Steel (Passivated Ultrasonically Cleaned), LTL - Left Hand Wound; LTR - Right Hand Wound LEE OUTSIDE WIRE TORQUE @ 90˚ RADIUS SUGGESTED LENGTH BODY NUMBER PRICE GROUP STOCK DIAMETER DIAMETER DEFLECTION (T) (R) MANDREL OF LEG LENGTH OF Music 302 316 NUMBER (See Footnote) SIZE (A) APPROX.(L) COILS Wire Stainless*Stainless IN. MM IN. MM IN.-LB. KG-MM IN. MM IN. MM IN. MM IN. MM M S S316 LTL012A 01 .105 2.67 .012 .30 .050 .58 .188 4.76 0.375 9.53 0.054 1.37 3.25 G J Z LTR012A 01 LTL015B 01 1/16 .111 2.82 .015 .38 .100 1.15 .250 6.35 1.59 0.500 12.70 0.068 1.73 3.25 G J AA LTR015B 01 (.063) LTL014A 01 .124 3.15 .014 .36 .075 .86 .250 6.35 0.500 12.70 0.065 1.65 3.25 G J AA LTR014A 01 LTL012A 07 .146 3.71 .012 .30 .048 .55 .250 6.35 0.500 12.70 0.039 0.99 2.25 G J Z LTR012A 07 LTL017C 01 3/32 .160 4.06 .017 .43 .125 1.44 .250 6.35 2.38 0.500 12.70 0.077 1.96 3.25 G J AA LTR017C 01 (.094) LTL015B 07 .171 4.34 .015 .38 .100 1.15 .250 6.35 0.500 12.70 0.049 1.24 2.25 G J AA LTR015B 07 LTL014A 07 .172 4.37 .014 .36 .075 .86 .250 6.35 0.500 12.70 0.046 1.17 2.25 G J AA LTR014A 07 LTL018C 01 1/8 .178 4.52 .018 .46 .150 1.73 .250 6.35 3.18 0.500 12.70 0.080 2.03 3.25 G J AA LTR018C 01 (.125) LTL020D 01 .191 4.85 .020 .51 .200 2.30 .375 9.53 0.750 19.05 0.090 2.29 3.25 G J AA LTR020D 01 LTL021D 01 .200 5.08 .021 .53 .250 2.88 .375 9.53 0.750 19.05 0.095 2.41 3.25 G J AA LTR021D 01 9/64 3.57 LTL023D 01 (.141) .204 5.18 .023 .58 .330 3.80 .375 9.53 0.750 19.05 0.103 2.62 3.25 G J AA LTR023D 01 LTL017C 07 .223 5.66 .017 .43 .125 1.44 .375 9.53 0.750 19.05 0.055 1.40 2.25 G J AA LTR017C 07 LTL018C 07 5/32 .234 5.94 .018 .46 .150 1.73 .375 9.53 3.97 0.750 19.05 0.058 1.47 2.25 G J AA LTR018C 07 (.156) LTL025E 01 .236 5.99 .025 .64 .420 4.84 .375 9.53 0.750 19.05 0.110 2.79 3.25 G J AA LTR025E 01 LTL021D 07 .261 6.63 .021 .53 .250 2.88 .500 12.70 1.000 25.40 0.068 1.73 2.25 G J AA LTR021D 07 LTL020D 07 .267 6.78 .020 .51 .200 2.30 .500 12.70 1.000 25.40 0.065 1.65 2.25 G J AA LTR020D 07 LTL028E 01 3/16 .267 6.78 .028 .71 .550 6.34 .500 12.70 4.76 1.000 25.40 0.125 3.18 3.25 J K AB LTR028E 01 (.188) LTL023D 07 .285 7.24 .023 .58 .330 3.80 .500 12.70 1.000 25.40 0.075 1.91 2.25 G J AA LTR023D 07 LTL032F 01 .288 7.32 .032 .81 .875 10.08 .500 12.70 1.000 25.40 0.145 3.68 3.25 J K AC LTR032F 01 LTL030F 01 .305 7.75 .030 .76 .680 7.83 .500 12.70 1.000 25.40 0.132 3.35 3.25 J K AC LTR030F 01 LTL025E 07 .312 7.92 .025 .64 .420 4.84 .500 12.70 1.000 25.40 0.081 2.06 2.25 J K AA LTR025E 07 7/32 5.56 LTL035G 01 (.219) TORSION SPRINGS .316 8.03 .035 .89 1.070 12.33 .625 15.88 1.250 31.75 0.153 3.89 3.25 J K AC LTR035G 01 LTL040H 01 .335 8.51 .040 1.02 1.500 17.28 .625 15.88 1.250 31.75 0.220 5.59 4.25 K L AD LTR040H 01 LTL045H 01 15/64 .356 9.04 .045 1.14 2.150 24.77 .625 15.88 5.95 1.250 31.75 0.245 6.22 4.25 L M AE LTR045H 01 (.234) SPECIAL INSTRUCTIONS FOR TORSION SERIES STOCK NUMBERS: Add “M” to end of Stock Number for Music Wire; “S” for Type 302 Stainless; “S316” for Type 316 Stainless.
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