Sprocket Engineering Data - martinsprocket.com

1 E-152 EngineeringE-152 Sprocket Engineering DATAROLLER CHAIN DIMENSIONSSPROCKET TOOTH DIMENSIONSMAXIMUM HUB RECOMMENDATIONSAPPLICATION AND SELECTIONHARDENINGCHAIN LENGTH CALCULATIONSPEED RATIOSSPROCKET DIAMETERSHORSEPOWER RATINGSSPROCKETSA merican Sprocket manufacturers have adopted 4 specific types of Sprocket constructionstyles as American Standards. In addition to the standard sprockets, special sprockets maybe available in the same styles. Style A - Flat Sprocket with no hub extension either side. Style B - Sprocket with hub extension one side. Style C - Sprocket with hub extension both sides. Style D - Sprocket with a detachable bolt on hub attached to a Single Single Type A Hub Type B Hub Single Single Type C Hub Type D HubLengthThru common styles Strand Sprockets-Listed using a letter prefix starting with the letter D for Double Strand, E for Triple Strand, and F for Quadruple, etc.

2 They also have the samehub configuration letter designation listed onprevious page. In addition to the four specifictypes, sprockets may also be made in variousother TB(taper bushed) Sprocket is another style of aninterchangeable bushed Sprocket , which provides apositive grip on a driven Splittype Sprocket is used in place of solid type toallow quick installation without disruption of shaft QD(quick detachable) Sprocket ; here a taperedbushing is bolted into the bore machined in the bushing, when inserted into the Sprocket ,compresses onto the shaft providing a tight Pin Sprocket Double TripleQDThe MST (MartinSplit Taper ) is another style ofbushed Sprocket . The bushing is similar to the QD styleexcept it has an external key that fits into the SplitSprocketNomenclatureE-154 SprocketNomenclatureE-154 Sprocket nomenclatures provide the chain pitch written to the left of the hubstyle code letter followed by the number of teeth in the Sprocket .

3 If the Sprocket isto be multiple strand, the prefix code letter is added to the beginning of the suffix of H is added if the teeth are to be heat treated. If the Sprocket is to be bored for QD, Taper Bushed or MST, the center hub letter is changed. ForQD and MST styles the letter designation of the bushing is used in lieu of the hubstyle code. If a taper bushing is to be used, the two letters TB are added behind thehub code some instances, the material a Sprocket is to be manufactured from will beadded into the part number as a example: SS - Stainless Steel Material NM - Non-Metallic BR - Brass or Bronze Material CD - Cadmium Plated Zi - Zinc Plated Ni - Nickel Plated CH - Chrome PlatedIf the part is to be used with a shear pin device, the center hub style letter issubstituted with an manufacturers of sprockets conform to the ANSI (American StandardsInstitute) and Martinconforms to the Type II tooth form as given in the - 1975.

4 It is not necessary to show detailed tooth information on sprocketdrawings, just specify ANSI standard tooth WidthBottom Dimensional SpecificationsBottom Diameter -The diameter of a circle tangent to the bottoms of the ( ) tooth spaces. Caliper Diameter -Since the bottom diameter of a Sprocket with odd number ofteeth cannot be measured directly, caliper diameters are themeasurement across the tooth spaces nearly Diameter -The diameter across to the pitch circle which is the circle( ) followed by the centers of the chain pins as the sprocketrevolves in mesh with the chain. PITCH PD = SIN (180/Nt)Outside Diameter -The measurement from the tip of the Sprocket tooth( ) across to the corresponding point directly across the is comparatively unimportant as the tooth length is not vital toproper meshing with the chain.

5 The outside diameter may varydepending on type of cutter used. OD = (Pitch) (.6 + COT [180 / Nt])Hub Diameter -That distance across the hub from one side to another.(HOD) This diameter must not exceed the calculated diameter of the inside of the chain side bars. Maximum Sprocket -Maximum Sprocket Bore is determined by the required Bore hub wall thickness for proper strength. Allowance must be made for keyway and Width -Face width is limited in its maximum dimension to allow properclearance to provide for chain engagement and minimum width is limited to provide the proper strength tocarry the imposed Thru Bore -Length Thru Bore (or ) must be sufficient to allow (LTB) a long enough key to withstand the torque transmitted by theshaft.

6 This also assures stability of the Sprocket on the ChainDimensionsE-156 25 1 8 .130 .237 .37 .34 875 25-2 1 8 .130 .237 .63 .59 1750 25-3 1 8 .130 .237 .88 .84 2626 35 3 16 .200 .356 .56 .50 2100 35-2 3 16 .200 .356 .96 .90 4200 35-3 3 16 .200 .356 6300 35-4 3 16 .200 .356 8400 35-5 3 16.

7 200 .356 10500 35-6 3 16 .200 .356 12600 40 5 16 .312 .475 .72 .67 3700 40-2 5 16 .312 .475 7400 40-3 5 16 .312 .475 11100 40-4 5 16 .312 .475 14800 40-6 5 16 .312 .475 22200 41 1 4 .306 .383 .65 .57 2000 50 3 8.

8 400 .594 .89 .83 6600 50-2 3 8 .400 .594 13200 50-3 3 8 .400 .594 19800 50-4 3 8 .400 .594 26400 50-5 3 8 .400 .594 33000 50-6 3 8 .400 .594 39600 60 1 2 .469 .712 8500 60-2 1 2 .469 .712 17000 60-3 1 2.

9 469 .712 25500 60-4 1 2 .469 .712 34000 60-5 1 2 .469 .712 42500 60-6 1 2 .469 .712 51000 80 5 8 .625 .950 14500 80-2 5 8 .625 .950 29000 80-3 5 8 .625 .950 43500 80-4 5 8 .625 .950 58000 80-5 5 8.

10 625 .950 72500 80-6 5 8 .625 .950 87000 Inside Cottered Riveted Average ANSI Roller Roller Link Plate Chain Chain Tensile Number Width Diam. Height Width* Width* StrengthSTANDARD SERIES CHAIN*Dimensions are across pins. 100 3 4 .750 24000 100-2 3 4 .750 48000 100-3 3 4.