PLASTICS INDEX...L-1 PLASTIC CAPABILITIES...L-2

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1 Index SECTION L PRODUCT PAGE INDEX...L-1 PLASTIC CAPABILITIES...L-2 SECTION I NON-METALLIC SPROCKETS...L-3 - L-12 Sprockets - Stock No. 25 1/4" Pitch...L-3 No. 35 3/8" Pitch...L-4 No. 40 1/2" Pitch...L-5 No. 50 5/8" Pitch...L-6 No. 60 3/4" Pitch...L-7 No. 80 1" Pitch...L-8 No /4" Pitch...L-9 No. 78 Series Non-Metallic Split Sprockets...L-10 Material Characteristics...L-11 SECTION II NATURAL NYLON GEARS...L-12 - L-21 Gears - Stock 14-1/2º Pressure Angle 4DP 2" Face...L-13 5DP 1-3/4" Face...L-14 6DP 1-1/2" Face...L-15 8DP 1-1/4" Face...L-16 10DP 1" Face...L-17 12DP 3/4" Face...L-18 16DP 1/2" Face...L-19 20DP 3/8" Face...L-20 Gear Racks 14-1/2º Pressure Angle...L-21 Gear Racks 20º Pressure Angle...L-21 SECTION III SPECIALTY ITEMS...L-22 - L-24 Waste Water Treatment Products...L-23 - L-24 L-1

2 Plastics Injection molded plastic products can be manufactured in a wide variety of sizes and shapes. At Martin we believe that continuous assessment, understanding, improvement and innovation of our product line is essential to providing for the everevolving needs of our customer base. In 1988, we saw the growing demand for molded plastics in our industry and added our injection mold facility in Paragould, Arkansas. This facility has been continually updated and is still recognized as one of the largest state-of-the-art facilities in the Southwest. Here we have the capacity and capabilities to produce custom products in a variety of sizes and shapes using a vast array of plastic compounds. With fuel costs at an all time high, competition from foreign sources, and manufacturing diligently working on ways to cut costs and improve their bottom line, more and more industries are looking to plastics or plastic compounds to reduce weight, improve wear in hostile environments, and reduce overall costs. Martin understands this need and now is able to offer machined plastic roller chain sprockets, engineered sprockets and rack and spur gears. Martin stocks a wide selection of these products and also has the ability to quickly custom manufacture to your specifications. Capabilities within our core machined plastic product line includes: Gear Rack up to 120" long 4" thick in 14-1/2º and 20º pressure angles; Spur Gear Custom plastic products may be made using materials such as UHMW, Nylon, & Acetal. Martin s Plastic Capabilities from 1" to 24" diameter, 14-1/2º pressure angles; Roller Chain Sprockets 25 to 120 Series, less than 1" diameter to more than 58" diameter; as well as Mill Sprockets (Engineering Class) in 78, 82 and 720 Series. Common materials of construction include UHMW, Nylon and Acetal. We offer many secondary operations such as side holes, tapped holes, o-ring grooves, milled threads, etc. Other variations of specialty manufacturing might include two-color and inserts. Custom products made to your exact specifications require precision equipment, quality workmanship, expedient delivery, and strict quality procedures. These are the foundation of Martin Sprocket and Gear. We work to ensure that your job is done right every time and ready to ship when you need it. We live up to our reputation for speed, dependability, and quality. The addition of machined plastics capabilities, coupled with nearly 60 years experience in steel product manufacturing, allows Martin to offer a complete line of both stock and custom products in steel, iron and plastics, as well as the ability to manufacture hybrid products using the three different technologies all under one roof. L-2

3 Plastic Sprockets No " Pitch Our Roller Chain Sprockets are machined from solid plates of material, resulting in a sprocket that you can count on to get the job done. O.D..110 Nominal Hub Dia. Single-Type B Bore (inches) Hub (inches) Weight No. Catalog Outside Rec. Length Lbs. Teeth Number Diameter Type Stock Max. Diameter Thru (Approx.) 9 25B9NM.837 B 1/4 1/4 7/16 1/ B10NM.919 B 1/4 1/4 1/2 1/ B11NM B 1/4 5/16 9/16 1/ B12NM B 1/4 3/8 5/8 1/ B13NM B 1/4 3/8 23/32 1/ B14NM B 1/4 7/16 13/16 1/ B15NM B 1/4 7/16 57/64 1/ B16NM B 1/4 7/16 31/32 1/ B17NM B 1/4 7/16 1-1/32 1/ B18NM B 1/4 1/2 1-1/8 1/ B19NM B 1/4 9/16 1-7/32 1/ B20NM B 1/4 9/16 1-9/32 5/ B21NM B 1/4 5/8 1-3/8 5/ B22NM B 1/4 3/4 1-7/16 5/ B23NM B 1/4 13/16 1-1/2 5/ B24NM B 3/8 13/16 1-1/2 5/ B25NM B 3/8 13/16 1-1/2 5/ B26NM B 3/8 13/16 1-1/2 5/ B28NM B 3/8 13/16 1-1/2 5/ B30NM B 3/8 13/16 1-1/2 5/ B32NM B 3/8 13/16 1-1/2 5/ B35NM B 3/8 13/16 1-1/2 5/ B36NM B 3/8 13/16 1-1/2 3/ B40NM B 1/2 1-1/8 2 3/ B42NM B 1/2 1-1/8 2 3/ B48NM B 1/2 1-1/8 2 3/ B54NM B 1/2 1-1/8 2 3/ B60NM B 1/2 1-1/8 2 3/ B70NM B 1/2 1-1/8 2 3/ B72NM B 1/2 1-1/8 2 3/ Notes: Standard Material: Natural Nylon Other numbers of teeth and hub styles available Available as stock drilled bore, finished drive bore with keyway and setscrews, or idler bore Length Thru TYPE B L-3

4 No " Pitch Plastic Sprockets Single-Type B Bore (inches) Hub (inches) Weight No. Catalog Outside Rec. Length Lbs. Teeth Number Diameter Type Stock Max. Diameter Thru (Approx.) 9 35B9NM B 3/8 3/8 27/32 3/ B10NM B 3/8 7/16 31/32 3/ B11NM B 3/8 7/16 1-1/16 3/ B12NM B 1/2 1/2 1-7/32 3/ B13NM B 1/2 9/16 1-1/4 3/ B14NM B 1/2 9/16 1-1/4 3/ B15NM B 1/2 5/8 1-11/32 7/ B16NM B 1/2 13/ /32 7/ B17NM B 1/2 13/ /32 7/ B18NM B 1/2 7/8 1-23/32 7/ B19NM B 1/2 7/8 1-27/32 7/ B20NM B 1/2 15/ /16 7/ B21NM B 1/2 1-1/8 2 7/ B22NM B 1/2 1-1/8 2 7/ B23NM B 1/2 1-1/8 2 7/ B24NM B 1/2 1-1/8 2 7/ B25NM B 1/2 1-1/8 2 7/ B26NM B 1/2 1-1/8 2 7/ B27NM B 1/2 1-1/8 2 7/ B28NM B 1/2 1-1/8 2 7/ B30NM B 1/2 1-1/8 2 7/ B32NM B 1/2 1-1/8 2 7/ B35NM B 5/8 1-3/4 3-1/4 7/ B36NM B 5/8 1-3/4 3-1/4 7/ B40NM B 5/8 1-3/4 3-1/ B42NM B 5/8 1-3/4 3-1/ B45NM B 5/8 1-3/4 3-1/ B48NM B 5/8 2-3/4 4-1/ B54NM B 5/8 2-3/4 4-1/ B60NM B 3/4 2-3/4 4-1/ B70NM B 3/4 4-1/ B72NM B 3/4 4-1/ B80NM B 3/4 4-1/ B84NM B 3/4 4-1/ B96NM B 3/4 4-1/ B112NM B 3/4 4-1/ Notes: Standard Material: Natural Nylon Other numbers of teeth and hub styles available Available as stock drilled bore, finished drive bore with keyway and setscrews, or idler bore. Our Roller Chain Sprockets are machined from solid plates of material, resulting in a sprocket that you can count on to get the job done. O.D. TYPE B.169 Nominal Length Thru Hub Dia. MSS Type B Sprocket with Stainless Steel Insert No. Bore (in.) ** No Teeth Teeth Bore (in.) ** 16 3/8, 1/2, 5/8 33 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 17 3/8, 1/2, 5/8 34 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 19 3/8, 1/2, 5/8 35 3/8, 5/8, 3/4, 7/8 20 3/8, 1/2, 5/8 36 3/8, 5/8, 3/4, 7/8 21 3/8, 1/2, 5/8, 3/4, 7/8 37 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 22 3/8, 1/2, 5/8, 3/4, 7/8 38 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 23 3/8, 1/2, 5/8, 3/4, 7/8 39 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 24 3/8, 1/2, 5/8, 3/4, 7/8 40 3/8, 1/2, 5/8, 3/4, 7/8, /8, 1/2, 5/8, 3/4, 7/8 41 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 26 3/8, 1/2, 5/8, 3/4, 7/8 42 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 27 3/8, 1/2, 5/8, 3/4, 7/8 43 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 28 3/8, 1/2, 5/8, 3/4, 7/8 44 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 29 3/8, 1/2, 5/8, 3/4, 7/8 45 3/8, 1/2, 5/8, 3/4, 7/8, /8, 1/2, 5/8, 3/4, 7/8 46 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 31 3/8, 1/2, 5/8, 3/4, 7/8 47 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 32 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 48 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 **Includes Keyway & Setscrew L-4

5 Our Roller Chain Sprockets are machined from solid plates of material, resulting in a sprocket that you can count on to get the job done. O.D. TYPE B.284 Nominal Length Thru Hub Dia. Notes: Standard Material: Natural Nylon Other numbers of teeth and hub styles available Available as stock drilled bore, finished drive bore with keyway and setscrews, or idler bore Plastic Sprockets Single-Type B No " Pitch Bore (inches) Hub (inches) Weight No. Catalog Outside Rec. Length Lbs. Teeth Number Diameter Type Stock Max. Diameter Thru (Approx.) 9 40B9NM B 1/2 7/16 1-1/16 7/ B10NM B 1/2 1/2 1-1/4 7/ B11NM B 1/2 9/16 1-3/8 7/ B12NM B 1/2 5/8 1-9/16 7/ B13NM B 1/2 5/8 1-9/16 7/ B14NM B 1/2 3/4 1-11/16 7/ B15NM B 1/2 7/8 1-13/16 7/ B16NM B 5/8 15/16 2 7/ B17NM B 5/8 1-1/8 2-1/ B18NM B 5/8 1-1/8 2-5/ B19NM B 5/8 1-1/4 2-1/ B20NM B 5/8 1-3/8 2-5/ B21NM B 5/8 1-1/2 2-3/ B22NM B 5/8 1-5/8 2-7/ B23NM B 5/8 1-5/ B24NM B 5/8 1-3/4 3-1/ B25NM B 5/8 1-3/4 3-1/ B26NM B 5/8 1-3/4 3-1/ B27NM B 5/8 1-3/4 3-1/ B28NM B 5/8 1-3/4 3-1/ B29NM B 5/8 1-3/4 3-1/ B30NM B 5/8 1-3/4 3-1/ B31NM B 5/8 1-3/4 3-1/ B32NM B 5/8 1-3/4 3-1/ B33NM B 5/8 1-3/4 3-1/ B34NM B 5/8 1-3/4 3-1/ B35NM B 5/8 1-3/4 3-1/ B36NM B 5/8 1-3/4 3-1/ B37NM B 5/8 1-3/4 3-1/ B38NM B 5/8 1-3/4 3-1/ B39NM B 5/8 1-3/4 3-1/ B40NM B 3/ /2 1-1/ B41NM B 3/ /2 1-1/ B42NM B 3/ /2 1-1/ B43NM B 3/ /2 1-1/ B44NM B 3/ /2 1-1/ B45NM B 3/ /2 1-1/ B46NM B 3/ /2 1-1/ B47NM B 3/ /2 1-1/ B48NM B 3/ /2 1-1/ B49NM B 3/ /2 1-1/ B50NM B 3/ /2 1-1/ B51NM B 3/ /2 1-1/ B52NM B 3/ /2 1-1/ B53NM B 3/ /2 1-1/ B54NM B 3/ /2 1-1/ B55NM B 3/4 2-1/ / B56NM B 3/4 2-1/ / B57NM B 3/4 4-1/ / B58NM B 3/4 4-1/ / B59NM B 3/4 4-1/ / B60NM B 3/4 4-1/ / B70NM B 3/4 4-1/ / B80NM B 3/4 4-1/ / B84NM B 3/4 4-1/ / B96NM B 1 4-1/ / MSS Type B Sprocket with Stainless Steel Insert No. Bore (in.) ** No Teeth Teeth Bore (in.) ** 16 3/8, 1/2, 5/8 33 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 17 3/8, 1/2, 5/8 34 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 19 3/8, 1/2, 5/8 35 3/8, 5/8, 3/4, 7/8 20 3/8, 1/2, 5/8 36 3/8, 5/8, 3/4, 7/8 21 3/8, 1/2, 5/8, 3/4, 7/8 37 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 22 3/8, 1/2, 5/8, 3/4, 7/8 38 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 23 3/8, 1/2, 5/8, 3/4, 7/8 39 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 24 3/8, 1/2, 5/8, 3/4, 7/8 40 3/8, 1/2, 5/8, 3/4, 7/8, /8, 1/2, 5/8, 3/4, 7/8 41 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 26 3/8, 1/2, 5/8, 3/4, 7/8 42 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 27 3/8, 1/2, 5/8, 3/4, 7/8 43 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 28 3/8, 1/2, 5/8, 3/4, 7/8 44 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 29 3/8, 1/2, 5/8, 3/4, 7/8 45 3/8, 1/2, 5/8, 3/4, 7/8, /8, 1/2, 5/8, 3/4, 7/8 46 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 31 3/8, 1/2, 5/8, 3/4, 7/8 47 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 32 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 48 3/8, 5/8, 3/4, 7/8, 1, 1-1/4 **Includes Keyway & Setscrew L-5

6 No " Pitch Plastic Sprockets Single-Type B Bore (inches) Hub (inches) Weight No. Catalog Outside Rec. Length Lbs. Teeth Number Diameter Type Stock Max. Diameter Thru (Approx.) 9 50B9NM B 5/8 3/4 1-3/ B10NM B 5/8 13/16 1-9/ B11NM B 5/8 7/8 1-3/ B12NM B 5/8 7/8 1-63/ B13NM B 5/8 7/8 1-7/ B14NM B 5/8 1-1/8 2-1/ B15NM B 5/8 1-1/4 2-3/ B16NM B 5/8 1-3/8 2-1/ B17NM B 5/8 1-1/2 2-11/ B18NM B 5/8 1-5/8 2-7/ B19NM B 5/8 1-3/ B20NM B 3/4 1-3/ B21NM B 3/4 1-3/ B22NM B 3/4 1-3/ B23NM B 3/4 1-3/ B24NM B 3/4 1-3/ / B25NM B 3/4 1-3/ / B26NM B 3/4 1-3/ / B27NM B 3/4 1-3/ / B28NM B 3/4 1-3/ / B29NM B 3/4 1-3/ / B30NM B 3/4 1-3/4 3-1/4 1-1/ B31NM B 3/4 1-3/4 3-1/4 1-1/ B32NM B 3/4 1-3/4 3-1/4 1-1/ B33NM B 3/4 1-3/4 3-1/4 1-1/ B34NM B 3/4 1-3/4 3-1/4 1-1/ B35NM B 3/4 1-3/4 3-1/4 1-1/ B36NM B 3/4 1-3/4 3-1/4 1-1/ B37NM B 3/4 1-3/4 3-1/4 1-1/ B38NM B 3/4 1-3/4 3-1/4 1-1/ B39NM B 3/4 1-3/4 3-1/4 1-1/ B40NM B 3/ /2 1-1/ B41NM B 3/ /2 1-1/ B42NM B 3/ /2 1-1/ B43NM B 3/ /2 1-1/ B44NM B 3/ /2 1-1/ B45NM B 1 2-3/ / B46NM B 1 2-3/ / B47NM B 1 2-3/ / B48NM B 1 2-3/ / B49NM B 1 2-3/ / B50NM B 1 2-3/4 4-1/2 1-1/ B51NM B 1 2-3/4 4-1/2 1-1/ B52NM B 1 2-3/4 4-1/2 1-1/ B53NM B 1 2-3/4 4-1/2 1-1/ B54NM B 1 2-3/4 4-1/2 1-1/ B55NM B 1 4-1/ / B56NM B 1 4-1/ / B57NM B 1 4-1/ / B58NM B 1 4-1/ / B59NM B 1 4-1/ / B60NM B 1 4-1/ / B70NM B 1 4-1/ / B72NM B 1 4-1/ / Our Roller Chain Sprockets are machined from solid plates of material, resulting in a sprocket that you can count on to get the job done. O.D. TYPE B.343 Nominal Length Thru Hub Dia. Notes: Standard Material: Natural UHMW Other numbers of teeth and hub styles available Available as stock drilled bore, finished drive bore with keyway and setscrews, or idler bore Large sprockets may have bolted-on hubs L-6

7 Plastic Sprockets No " Pitch Our Roller Chain Sprockets are machined from solid plates of material, resulting in a sprocket that you can count on to get the job done. O.D. TYPE B.459 Nominal Length Thru Hub Dia. Notes: Standard Material: Natural UHMW Other numbers of teeth and hub styles available Available as stock drilled bore, finished drive bore with keyway and setscrews, or idler bore Large sprockets may have bolted-on hubs Single-Type B Bore (inches) Hub (inches) Weight No. Catalog Outside Rec. Length Lbs. Teeth Number Diameter Type Stock Max. Diameter Thru (Approx.) 9 60B9NM B 3/4 7/8 1-1/2 1-1/ B10NM B 3/4 7/8 1-1/2 1-1/ B11NM B 3/ / B12NM B 3/4 1-1/ / B13NM B 3/4 1-1/4 2-5/16 1-1/ B14NM B 3/4 1-3/8 2-1/2 1-1/ B15NM B 3/4 1-5/8 2-7/8 1-1/ B16NM B 3/4 1-3/ / B17NM B 3/4 1-3/4 3-1/4 1-1/ B18NM B 3/ /2 1-1/ B19NM B 3/ /2 1-1/ B20NM B 3/4 2-1/4 3-7/8 1-1/ B21NM B 3/4 2-3/ / B22NM B 3/4 2-3/ / B23NM B 3/4 2-3/ / B24NM B 3/4 2-3/ / B25NM B 3/4 2-3/ / B26NM B 3/4 2-3/ / B27NM B 3/4 2-3/ / B28NM B 3/4 2-3/ / B29NM B 3/4 2-3/ / B30NM B 3/4 2-3/ / B31NM B 3/4 2-3/ / B32NM B 3/4 2-3/ / B33NM B 1 2-3/ / B34NM B 1 2-3/4 4-1/2 1-1/ B35NM B 1 2-3/4 4-1/2 1-1/ B36NM B 1 2-3/4 4-1/2 1-1/ B37NM B 1 2-3/4 4-1/2 1-1/ B38NM B 1 2-3/4 4-1/2 1-1/ B39NM B 1 2-3/4 4-1/2 1-1/ B40NM B 1 4-1/ / B41NM B 1 4-1/ / B42NM B 1 4-1/ / B43NM B 1 4-1/ / B44NM B 1 4-1/ / B45NM B 1 4-1/ / B46NM B 1 4-1/ / B47NM B 1 4-1/ / B48NM B 1 4-1/ / B49NM B 1 4-1/ / B50NM B 1 4-1/ / B51NM B 1 4-1/ / B52NM B 1 4-1/ / B53NM B 1 4-1/ / B54NM B 1 4-1/ / B55NM B 1-1/4 4-1/ / B56NM B 1-1/4 4-1/ / B57NM B 1-1/4 4-1/ / B58NM B 1-1/4 4-1/ / B59NM B 1-1/4 4-1/ / B60NM B 1-1/4 4-1/ / L-7

8 No. 80 1" Pitch Plastic Sprockets Single-Type B Bore (inches) Hub (inches) Weight No. Catalog Outside Rec. Length Lbs. Teeth Number Diameter Type Stock Max. Diameter Thru (Approx.) 9 80B9NM B / B10NM B / B11NM B / B12NM B / B13NM B 1 1-3/4 3-1/4 1-1/ B14NM B 1 1-3/4 3-1/4 1-1/ B15NM B 1 1-3/4 3-1/4 1-1/ B16NM B 1 2-3/ / B17NM B 1 2-3/ / B18NM B 1 2-5/8 4-1/4 1-1/ B19NM B 1 2-5/8 4-1/4 1-1/ B20NM B 1 2-5/8 4-1/4 1-1/ B21NM B 1 2-5/8 4-1/4 1-3/ B22NM B 1 2-5/8 4-1/4 1-3/ B23NM B 1 2-5/8 4-1/4 1-3/ B24NM B 1 2-5/8 4-1/4 1-3/ B25NM B 1 2-5/8 4-1/4 1-3/ B26NM B 1-1/4 2-3/4 4-3/ B27NM B 1-1/4 2-3/4 4-3/ B28NM B 1-1/4 2-3/4 4-3/ B29NM B 1-1/4 2-3/4 4-3/ B30NM B 1-1/4 2-3/4 4-3/ B31NM B 1-1/4 2-3/4 4-3/ B32NM B 1-1/4 2-3/4 4-3/ B33NM B 1-1/4 2-3/4 4-3/ B34NM B 1-1/4 2-3/4 4-3/ B35NM B 1-1/4 2-3/4 4-3/ B36NM B 1-1/4 2-3/4 4-3/ B37NM B 1-1/4 4-1/ B38NM B 1-1/4 4-1/ B39NM B 1-1/4 4-1/ B40NM B 1-1/4 4-1/ B41NM B 1-1/4 4-1/ B42NM B 1-1/4 4-1/ B43NM B 1-1/4 4-1/ B44NM B 1-1/4 4-1/ B45NM B 1-1/4 4-1/ B46NM B 1-1/4 4-1/ B47NM B 1-1/4 4-1/ B48NM B 1-1/4 4-1/ B49NM B 1-1/4 4-1/ Our Roller Chain Sprockets are machined from solid plates of material, resulting in a sprocket that you can count on to get the job done. O.D. TYPE B.575 Nominal Length Thru Hub Dia. Notes: Standard Material: Natural UHMW Other numbers of teeth and hub styles available Available as stock drilled bore, finished drive bore with keyway and setscrews, or idler bore Large sprockets may have bolted-on hubs L-8

9 Plastic Sprockets No " Pitch Our Roller Chain Sprockets are machined from solid plates of material, resulting in a sprocket that you can count on to get the job done. O.D..692 Nominal Length Thru Hub Dia. Single-Type B Bore (inches) Hub (inches) Weight No. Catalog Outside Rec. Length Lbs. Teeth Number Diameter Type Stock Max. Diameter Thru (Approx.) 8 100B8NM B 1 1-1/ / B9NM B 1 1-1/ / B10NM B 1 1-3/4 3-1/4 1-3/ B11NM B 1 1-3/4 3-1/4 1-3/ B12NM B 1 1-3/4 3-1/4 1-3/ B13NM B 1 1-3/4 3-1/4 1-3/ B14NM B 1-1/4 1-3/4 3-1/4 1-3/ B15NM B 1-1/4 2-3/ / B16NM B 1-1/4 2-3/ / B17NM B 1-1/4 2-3/ / B18NM B 1-1/4 2-3/ / B19NM B 1-1/4 2-3/ B20NM B 1-1/4 2-3/ B21NM B 1-1/4 2-3/4 4-1/ B22NM B 1-1/4 2-3/4 4-1/ B23NM B 1-1/4 2-3/4 4-1/ B24NM B 1-1/4 2-3/4 4-1/ B25NM B 1-1/4 2-3/4 4-1/ B26NM B 1-1/ B27NM B 1-1/ B28NM B 1-1/ B29NM B 1-1/ B30NM B 1-1/ B31NM B 1-1/4 3-3/ B32NM B 1-1/4 3-3/ B33NM B 1-1/4 3-3/ B34NM B 1-1/4 3-3/ B35NM B 1-1/4 3-3/ / B36NM B 1-1/4 3-3/ / B37NM B 1-1/4 3-3/ / B38NM B 1-1/4 3-3/ / Notes: Standard Material: Natural UHMW Other numbers of teeth and hub styles available Available as stock drilled bore, finished drive bore with keyway and setscrews, or idler bore Large sprockets may have bolted-on hubs TYPE B L-9

10 78 Series Non-Metallic Split Sprockets 78 SERIES NON-METALLIC SPROCKETS FOR CHAINS: 78 H H75 H78 H 78RT H 78SR H79 NH78 578R 588R S78 S78 R588 RR588 RR588 R IS880 87R IS881 IS /2 LXS882 LXS86 US881 LXS887 LXS SS578 SS188 US278 US882 26D H78LR (14-18 TEETH) PLATE THICKNESS.875" Black UHMW Stock Type C 2.609'' Pitch Split ROLLER DIAMETER 7 /8" Sprockets Number of Catalog Pitch Stock Max. Hub Weight Lbs. Teeth Number Diameter Bore Bore Diameter L.T.B. (Approx.) 6 78C6NMS /2 NA 2-7/ C7NMS /8 NA 2-7/ C8NMS /8 NA 2-7/ C9NMS NA 2-7/ C10NMS NA C11NMS NA C12NMS NA C13NMS NA C14NMS NA C15NMS NA C16NMS NA C17NMS NA C18NMS NA C19NMS NA C20NMS /4 4-1/2 NA C21NMS /4 4-1/2 NA C22NMS /4 4-1/2 NA C23NMS /4 4-1/2 NA C24NMS /4 4-1/2 NA C25NMS /4 4-1/2 NA C27NMS /4 4-1/2 NA C28NMS /4 4-1/2 NA C30NMS /4 4-1/2 NA C34NMS /4 4-1/2 NA C40NMS /4 4-1/2 NA C45NMS /4 4-1/2 NA PLATE THICKNESS.875" Black UHMW Stock Type C 2.609'' Pitch Non-Split ROLLER DIAMETER 7 /8" Sprockets Number of Catalog Pitch Stock Max. Hub Weight Lbs. Teeth Number Diameter Bore Bore Diameter L.T.B. Weight 4 78C4NM /2 3/ C5NM / C6NM /4 1-1/ C7NM / C8NM /4 4-3/ C9NM /4 5-1/ C10NM /4 5-1/ C11NM /4 5-1/ C12NM /4 5-1/ C13NM /8 5-1/ C14NM /8 5-1/ C15NM /8 5-1/ C16NM /8 5-1/ C17NM /8 5-1/ C18NM /8 5-1/ Please contact Martin if Hub OD and Length Thru Bore dimensions are critical. * These parts have setscrews at 90 degrees and 180 degrees instead of over keyway and 90 degrees. 1 Chain saver hubs, chain may contact hubs. Only applicable to sprockets with 4, 5, and 6 teeth. Pitch Dia. Plate Thickness Hub Dia. L-10

11 Material Characteristics MATERIAL UHMW Excellent abrasion resistance Low co-efficient of friction Shear strength of approximately 3,500 psi Flexural mod. of approximately 125,000 psi Economical Floats in water Two common types: Natural virgin Food applications Black reprocessed Resistant to UV degradation Slightly less expensive May have multi-colored specks Nylon Good abrasion resistance Excellent PV value for bearing applications Shear strength of approximately 10,500 psi Flexural mod. of approximately 500,000 psi Mid-priced Does not float in water Will absorb moisture resulting in dimensional changes and reduced strength Several common types: Natural Food applications MD filled (dark grey color) High load bushings Oil-filled (natural or green color) Gears, bushings, other sliding wear components Acetal (Typically used for structural components) Not great for wear applications Shear strength of approximately 8,000 psi Flexural mod. of approximately 400,000 psi Mid-priced Does not float in water Does not absorb moisture, good dimensional stability Also known as DuPont Delrin acetal resin. Available in white, or black. DuPont and Delrin is a registered trademarks or trademarks of E. I. du Pont de Nemours and Company or its affiliates. COMMON APPLICATIONS Wear strips Chain guide Conveyor beds Large structural components RC sprockets (usually 50 series and larger) Mill Sprockets (Engineering Class) (nearly always black reprocessed UHMW) Bushings High temperature wear strips Small structural components Bushings Spur Gears RC sprockets (usually 50 series and smaller). High temperature wear strips Small structural components RC sprockets (usually 50 series and smaller). Bushings Spur gears Components of food processing equipment exposed to wet environments clamps, rollers, dies L-11

12 Plastic Gears Introduction Martin stocks B Style Nylon Spur Gears. Other styles and materials are available as Madeto-Order. Spur gears are available with stock bore, idler bore, or finished bore with keyway and setscrews. Standard material of construction is UHMW, Nylon and Acetal. Gear rack is supplied in nominal 48" lengths, however other lengths can be supplied upon request. Plastic gears have been used successfully without lubrication in many of todays open gear applications. Many will work lubrication free in demanding applications where steel gears will rust or require continuous maintenance. One key issue in selecting a plastic gear is proper sizing. Plastics have different properties than metals and are sensitive to changing operating conditions. In addition to load data, attention to drive geometry, environmental and operating conditions and plastic material properties is critical. Martin s dedicated sales staff has the experience and knowledge to help you identify and specify the proper gear for your application. Benefits of Plastic: Cost Effective Noise Reduction Ability to Absorb Shock and Vibration Relatively Low Coefficient of Friction Corrosion Resistance - elimination of plating, or protective coatings. Tolerances often less critical than metal due to greater resilience. L-12

13 Our Spur Gears are machined from solid plates of material, resulting in a spur gear that you can count on to get the job done. Standard Material: Natural Oil- Filled Nylon Other numbers of teeth and hub styles available Available as finished bore with Keyway and Set Screws Nylon Stock Spur Gears Pressure Angle Outside Dia. Pitch Dia. Face Proj. Hub Dia. Bore 4 DP 2'' Face Natural Oil-Filled Nylon Spur Gears No. Catalog Pressure Diameter Bore (Inches) Hub (Inches) Weight Lbs. Teeth Number Angle (Deg.) Pitch Outside Type Stock Max.* Diameter Proj. (Approx.) 11 NM / B 3/4 1-1/4 2-1/4 7/ NM / B 3/4 1-1/4 2-1/4 7/ NM / B 3/4 1-1/4 2-1/4 7/ NM / B 3/4 1-5/8 2-3/4 7/ NM / B 1 1-3/4 3 7/ NM / B 1 1-3/4 3-1/4 7/ NM / B /2 7/ NM / B 1 2-1/4 3-3/4 7/ NM / B 1 2-3/8 4 7/ NM / B 1 2-5/8 4-1/4 7/ NM / B 1 2-3/4 4-1/2 7/ NM / B 1 2-3/4 4-3/4 7/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2 3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B /8 1-1/ NM / B /8 1-1/ NM / B /8 1-1/ NM / B /8 1-1/ NM / B /8 1-1/ NM / B /8 1-1/ NM / B /8 1-1/ NM / B /8 1-1/ NM / B /8 1-1/ NM / B /8 1-1/ NM / B / NM / B / NM / B / NM / B / NM / B / NM / B / NM / B / * Recommended Maximum Bore With Keyway and Setscrew. Enlarged Pitch Diameter with Special Tooth Form P.A. Gears Will Not Operate With 20 P.A. L-13

14 5 DP 1 3 /4'' Face Outside Dia. Pitch Dia. Face Proj. Hub Dia Bore Natural Oil-Filled Nylon Spur Gears Nylon Stock Spur Gears Pressure Angle Our Spur Gears are machined from solid plates of material, resulting in a spur gear that you can count on to get the job done. Standard Material: Natural Oil- Filled Nylon Other numbers of teeth and hub styles available Available as finished bore with Keyway and Set Screws No. Catalog Pressure Diameter Bore (Inches) Hub (Inches) Weight Lbs. Teeth Number Angle (Deg.) Pitch Outside Type Stock Max.* Diameter Proj. (Approx.) 11 NM / B 3/4 7/8 1-25/32 7/ NM / B 3/4 7/8 1-25/32 7/ NM / B 3/4 1-1/8 2 7/ NM / B 3/4 1-1/8 2-3/16 7/ NM / B 3/4 1-1/4 2-3/8 7/ NM / B 3/4 1-3/8 2-19/32 7/ NM / B 3/4 1-5/8 2-7/8 7/ NM / B 1 1-3/4 3 7/ NM / B 1 1-3/4 3-1/4 7/ NM / B 1 1-3/4 3-3/8 7/ NM / B 1 1-3/4 3-3/8 7/ NM / B 1 1-3/4 3-3/8 7/ NM / B 1 1-3/4 3-3/8 7/ NM / B 1 1-3/4 3-3/8 1-1/ NM / B 1 1-3/4 3-3/8 1-1/ NM / B 1 1-3/4 3-3/8 1-1/ NM / B 1 1-3/4 3-3/8 1-1/ NM / B 1 2-5/8 4-1/4 1-1/ NM / B 1 2-5/8 4-1/4 1-1/ NM / B 1 2-5/8 4-1/4 1-1/ NM / B 1 2-5/8 4-1/4 1-1/ NM / B 1 2-5/8 4-1/4 1-1/ NM / B 1 2-5/8 4-1/4 1-1/ NM / B 1 2-5/8 4-1/4 1-1/ NM / B 1 2-3/4 4-5/8 1-1/ NM / B 1 2-3/4 4-5/8 1-1/ NM / B 1 2-3/4 4-5/8 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B 1 2-3/4 4-3/4 1-1/ NM / B / NM / B / NM / B / NM / B / NM / B / NM / B / NM / B / NM / B / * Recommended Maximum Bore With Keyway and Setscrew. Enlarged Pitch Diameter with Special Tooth Form P.A. Gears Will Not Operate With 20 P.A. L-14

15 Nylon Stock Spur Gears Pressure Angle 6 DP 1 1 /2'' Face Natural Oil-Filled Nylon Spur Gears No. Catalog Pressure Diameter Bore (Inches) Hub (Inches) Weight Lbs. Teeth Number Angle (Deg.) Pitch Outside Type Stock Max.* Diameter Proj. (Approx.) 11 NM / B 3/4 13/16 1-1/2 7/ NM / B 3/4 13/16 1-1/2 7/ NM / B 3/4 13/16 1-1/2 7/ NM / B 3/4 7/8 1-13/16 7/ NM / B 3/4 1-1/8 2 7/ NM / B 3/4 1-1/8 2-1/6 7/ NM / B 3/4 1-1/8 2-1/6 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 3/4 1-5/8 2-27/32 7/ NM / B 1 1-3/4 3 7/ NM / B 1 1-3/4 3 7/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/4 3-1/ NM / B 1 1-3/4 3-1/ NM / B 1 1-3/4 3-1/ NM / B 1 1-3/4 3-1/ NM / B 1 1-3/4 3-1/ NM / B 1 1-3/4 3-1/ NM / B 1 2-3/ NM / B 1 2-3/ NM / B 1 2-3/ NM / B 1 2-3/ NM / B 1 2-3/ NM / B 1 2-3/ NM / B 1 2-1/2 4-1/ NM / B 1 2-1/2 4-1/ NM / B 1 2-5/8 4-1/ NM / B 1 2-5/8 4-3/ NM / B 1 2-5/8 4-3/ NM / B 1 2-5/8 4-3/ NM / B 1 2-5/8 4-3/ NM / B 1 2-5/8 4-3/8 1-1/ NM / B 1 2-5/8 4-3/8 1-1/ NM / B 1 2-5/8 4-3/8 1-1/ NM / B 1 2-5/8 4-3/8 1-1/ NM / B 1 2-5/8 4-3/8 1-1/ NM / B 1 2-5/8 4-3/8 1-1/ NM / B 1 2-5/8 4-3/8 1-1/ NM / B 1 2-5/8 4-3/8 1-1/ NM / B 1 2-5/8 4-3/8 1-1/ NM / B 1 2-3/4 4-1/2 1-1/ NM / B 1 2-3/4 4-1/2 1-1/ NM / B 1 2-3/4 4-1/2 1-1/ NM / B 1 2-3/4 4-1/2 1-1/ NM / B 1 2-3/4 4-1/2 1-1/ NM / B 1 2-3/4 4-1/2 1-1/ NM / B 1 2-3/4 4-1/2 1-1/ NM / B 1 2-3/4 4-1/2 1-1/ NM / B 1 2-3/4 4-1/2 1-1/ * Recommended Maximum Bore With Keyway and Setscrew. Enlarged Pitch Diameter with Special Tooth Form P.A. Gears Will Not Operate With 20 P.A. L-15

16 8 DP 1 1 /4'' Face Nylon Stock Spur Gears Pressure Angle Natural Oil-Filled Nylon Spur Gears No. Catalog Pressure Diameter Bore (Inches) Hub (Inches) Weight Lbs. Teeth Number Angle (Deg.) Pitch Outside Type Stock Max.* Diameter Proj. (Approx.) 11 NM / B 1/2 1/2 1-1/8 3/ NM / B 1/2 1/2 1-1/8 3/ NM / B 1/2 9/16 1-1/4 3/ NM / B 1/2 5/8 1-3/8 3/ NM / B 1/2 13/16 1-1/2 3/ NM / B 1/2 7/8 1-5/8 3/ NM / B 1/2 7/8 1-3/4 3/ NM / B 3/ /8 3/ NM / B 3/4 1-1/8 2 3/ NM / B 3/4 1-1/8 2-1/8 3/ NM / B 3/4 1-1/4 2-1/4 3/ NM / B 3/4 1-1/4 2-3/8 3/ NM / B 3/4 1-3/8 2-1/ NM / B 3/4 1-1/2 2-5/ NM / B 3/4 1-1/2 2-5/ NM / B 3/4 1-1/2 2-5/ NM / B 3/4 1-5/8 2-3/ NM / B 1 1-3/4 2-7/ NM / B 1 1-3/4 2-7/ NM / B 1 1-3/4 2-7/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B 1 1-3/ NM / B / NM / B / NM / B / NM / B / NM / B / NM / B / NM / B / NM / B / NM / B / NM / B / NM / B /2 1-1/ NM / B 1 2-3/ / NM / B 1 2-3/ / NM / B 1 2-3/ / NM / B 1 2-3/ / NM / B 1 2-3/ / NM / B 1 2-3/ / NM / B 1 2-3/ / NM / B 1 2-3/ / NM / B 1 2-3/ / * Recommended Maximum Bore With Keyway and Setscrew. Enlarged Pitch Diameter with Special Tooth Form P.A. Gears Will Not Operate With 20 P.A. L-16

17 Nylon Stock Spur Gears Pressure Angle 10 DP 1'' Face Natural Oil-Filled Nylon Spur Gears No. Catalog Pressure Diameter Bore (Inches) Hub (Inches) Weight Lbs. Teeth Number Angle (Deg.) Pitch Outside Type Stock Max.* Diameter Proj. (Approx.) 11 NM / B 3/8 7/16 15/16 5/ NM / B 3/8 7/16 15/16 5/ NM / B 3/8 7/16 1 5/ NM / B 1/2 1/2 1-1/8 5/ NM / B 1/2 1/2 1-7/32 5/ NM / B 1/2 9/16 1-5/16 5/ NM / B 1/2 5/8 1-3/8 5/ NM / B 1/2 3/4 1-17/32 5/ NM / B 1/2 3/4 1-9/16 5/ NM / B 1/2 7/8 1-23/32 5/ NM / B 1/2 7/8 1-3/4 5/ NM / B 1/ /8 5/ NM / B 3/4 1-1/8 2 5/ NM / B 3/4 1-1/4 2-1/8 5/ NM / B 3/4 1-1/4 2-1/8 5/ NM / B 3/4 1-1/4 2-1/8 7/ NM / B 3/4 1-1/4 2-1/8 7/ NM / B 3/4 1-1/4 2-1/8 7/ NM / B 3/4 1-1/4 2-1/8 7/ NM / B 3/4 1-1/4 2-1/8 7/ NM / B 3/4 1-1/4 2-1/4 7/ NM / B 3/4 1-1/4 2-1/4 7/ NM / B 3/4 1-1/4 2-1/4 7/ NM / B 3/4 1-1/4 2-1/4 7/ NM / B 3/4 1-1/4 2-1/4 7/ NM / B 3/4 1-1/4 2-1/4 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 3/4 1-3/8 2-1/2 7/ NM / B 7/8 1-5/8 2-3/4 7/ NM / B 7/8 1-5/8 2-3/4 7/ NM / B 7/8 1-5/8 2-3/4 7/ NM / B 7/8 1-5/8 2-3/4 7/ NM / B 7/8 1-5/8 2-3/4 7/ NM / B 7/8 1-5/8 2-3/4 7/ NM / B 7/8 1-5/8 2-3/4 7/ NM / B 7/8 1-5/8 2-3/4 7/ NM / B 7/8 1-3/4 3 7/ NM / B 7/8 1-3/4 3 7/ NM / B 7/8 1-3/4 3 7/ NM / B 7/8 1-3/4 3 7/ NM / B 7/8 1-3/4 3 7/ NM / B 7/8 1-3/4 3 7/ NM / B 7/8 1-3/4 3 7/ NM / B 7/8 1-3/ NM / B 7/8 1-3/ NM / B 7/8 1-3/ NM / B 7/8 1-3/ * Recommended Maximum Bore With Keyway and Setscrew. Enlarged Pitch Diameter with Special Tooth Form P.A. Gears Will Not Operate With 20 P.A. L-17

18 12 DP 3 /4'' Face Natural Oil-Filled Nylon Spur Gears * Recommended Maximum Bore With Keyway and Setscrew. Enlarged Pitch Diameter with Special Tooth Form. Nylon Stock Spur Gears Pressure Angle No. Catalog Pressure Diameter Bore (Inches) Hub (Inches) Weight Lbs. Teeth Number Angle (Deg.) Pitch Outside Type Stock Max.* Diameter Proj. (Approx.) 11 NM / B 3/8 7/16 3/4 1/ NM / B 3/8 7/16 3/4 1/ NM / B 3/8 7/16 13/16 1/ NM / B 3/8 7/16 29/32 1/ NM / B 3/8 7/16 1 1/ NM / B 1/2 1/2 1-1/16 1/ NM / B 1/2 1/2 1-1/8 1/ NM / B 1/2 1/2 1-1/4 1/ NM / B 1/2 9/16 1-5/16 1/ NM / B 1/2 3/4 1-13/32 1/ NM / B 1/2 13/16 1-1/2 1/ NM / B 1/2 13/16 1-9/16 1/ NM / B 1/2 3/4 1-5/8 1/ NM / B 1/2 7/8 1-3/4 1/ NM / B 1/2 7/8 1-15/16 5/ NM / B 5/8 1-1/8 2-1/16 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-3/8 2-1/2 5/ NM / B 5/8 1-3/8 2-1/2 5/ NM / B 5/8 1-3/8 2-1/2 5/ NM / B 5/8 1-3/8 2-1/2 5/ NM / B 5/8 1-3/8 2-1/2 5/ NM / B 5/8 1-3/8 2-1/2 5/ NM / B 5/8 1-3/8 2-1/2 3/ NM / B 5/8 1-3/8 2-1/2 3/ NM / B 5/8 1-3/8 2-1/2 3/ NM / B 5/8 1-3/8 2-1/2 3/ NM / B 5/8 1-3/8 2-1/2 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-5/8 2-3/4 3/ NM / B 3/4 1-3/4 3 3/ NM / B 3/4 1-3/4 3 3/ NM / B 3/4 1-3/4 3 3/ NM / B 3/4 1-3/4 3 3/ NM / B 3/4 1-3/4 3 3/ NM / B 3/4 1-3/4 3 3/ NM / B 3/4 1-3/4 3 3/ NM / B 3/4 1-3/4 3 3/ NM / B 3/4 1-3/4 3 3/ NM / B 3/4 1-3/4 3 3/ NM / B 3/4 1-3/4 3 3/ NM / B 3/4 1-3/4 3 3/ P.A. Gears Will Not Operate With 20 P.A. L-18

19 Nylon Stock Spur Gears Pressure Angle 16 DP 1 /2'' Face Natural Oil-Filled Nylon Spur Gears No. Catalog Pressure Diameter Bore (Inches) Hub (Inches) Weight Lbs. Teeth Number Angle (Deg.) Pitch Outside Type Stock Max.* Diameter Proj. (Approx.) 11 NM / B 3/8 3/8 9/16 7/ NM / B 3/8 3/8 9/16 7/ NM / B 3/8 3/8 5/8 7/ NM / B 3/8 3/8 11/16 7/ NM / B 3/8 7/16 3/4 7/ NM / B 3/8 7/16 13/16 7/ NM / B 3/8 7/16 7/8 7/ NM / B 3/8 7/16 15/16 7/ NM / B 3/8 7/16 1 7/ NM / B 1/2 1/2 1-1/16 7/ NM / B 1/2 1/2 1-1/8 7/ NM / B 1/2 1/2 1-3/16 7/ NM / B 1/2 9/16 1-1/4 7/ NM / B 1/2 5/8 1-5/16 7/ NM / B 1/2 3/4 1-7/16 7/ NM / B 1/2 13/16 1-1/2 1/ NM / B 1/2 13/16 1-5/8 1/ NM / B 1/2 7/8 1-3/4 1/ NM / B 1/2 7/8 1-3/4 1/ NM / B 1/ /8 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 1/ NM / B 1/2 1-1/8 2 5/ NM / B 5/8 1-1/8 2 5/ NM / B 5/8 1-1/8 2 5/ NM / B 5/8 1-1/8 2 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-1/4 2-1/4 5/ NM / B 5/8 1-3/8 2-1/2 5/ NM / B 5/8 1-3/8 2-1/2 5/ NM / B 5/8 1-3/8 2-1/2 5/ * Recommended Maximum Bore With Keyway and Setscrew. Enlarged Pitch Diameter with Special Tooth Form P.A. Gears Will Not Operate With 20 P.A. L-19

20 20 DP 3 /8'' Face Natural Oil-Filled Nylon Spur Gears * Recommended Maximum Bore With Keyway and Setscrew. Enlarged Pitch Diameter with Special Tooth Form. Nylon Stock Spur Gears Pressure Angle No. Catalog Pressure Diameter Bore (Inches) Hub (Inches) Weight Lbs. Teeth Number Angle (Deg.) Pitch Outside Type Stock Max.* Diameter Proj. (Approx.) 11 NM / B 5/16 5/16 15/32 3/ NM / B 5/16 5/16 15/32 3/ NM / B 5/16 5/16 1/2 3/ NM / B 5/16 5/16 35/64 3/ NM / B 3/8 3/8 39/64 3/ NM / B 3/8 3/8 21/32 3/ NM / B 3/8 3/8 45/64 3/ NM / B 3/8 3/8 3/4 3/ NM / B 3/8 3/8 51/64 3/ NM / B 3/8 3/8 55/64 3/ NM / B 3/8 3/8 7/8 3/ NM / B 3/8 3/8 31/32 3/ NM / B 3/8 3/8 31/32 3/ NM / B 3/8 1/2 1-1/16 3/ NM / B 3/8 9/16 1-3/16 3/ NM / B 3/8 9/ /64 3/ NM / B 3/8 5/8 1-23/64 3/ NM / B 3/8 3/4 1-7/16 1/ NM / B 3/8 3/4 1-7/16 1/ NM / B 3/8 13/16 1-1/2 1/ NM / B 3/8 13/16 1-5/8 1/ NM / B 3/8 7/8 1-3/4 1/ NM / B 3/8 7/8 1-3/4 1/ NM / B 3/8 7/8 1-13/16 1/ NM / B 3/ /8 1/ NM / B 3/ /8 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/8 2 1/ NM / B 3/8 1-1/4 2-1/4 1/ NM / B 3/8 1-1/4 2-1/4 1/ NM / B 3/8 1-1/4 2-1/4 1/ NM / B 3/8 1-1/4 2-1/4 1/ NM / B 3/8 1-1/4 2-1/4 1/ NM / B 1/2 1-1/4 2-1/4 1/ NM / B 1/2 1-1/4 2-1/4 1/ NM / B 1/2 1-1/4 2-1/4 1/ NM / B 1/2 1-1/4 2-1/4 1/ NM / B 1/2 1-1/4 2-1/4 1/ NM / B 1/2 1-3/8 2-1/2 1/ NM / B 1/2 1-3/8 2-1/2 1/ NM / B 1/2 1-3/8 2-1/2 1/ P.A. Gears Will Not Operate With 20 P.A. L-20

21 Machined Nylon Gear Rack 14-1/2 Gear Rack Face Overall Pitch Weight Catalog Width Thickness Line Lbs./Pc Number Pitch (Inches) (Inches) Backing (Approx.) R3X4NM / R4X4NM / RA4X4NM R5X4NM 5 1-3/4 1-1/ RA5X4NM 5 1-3/4 1-1/ R6X4NM 6 1-1/ RA6X4NM 6 1-1/2 1-1/ R8X4NM 8 1-1/4 3/ RA8X4NM 8 1-1/4 1-1/ R10X4NM / RA10X4NM R12X4NM 12 3/4 1/ RA12X4NM 12 3/4 3/ RA16X4NM 16 1/2 1/ RA20X4NM 20 3/8 3/ Standard Material: Natural Oil-Filled Nylon Other dimensions available Supplied as nominal 48" lengths. Matched ends available upon request 20 Gear Rack Face Overall Pitch Weight Catalog Width Thickness Line Lbs./Pc Number Pitch (Inches) (Inches) Backing (Approx.) TR3X4NM / TR4X4NM / R204X4NM TR5X4NM 5 1-3/4 1-1/ R205X4NM 5 1-3/4 1-1/ TR6X4NM 6 1-1/ R206X4NM 6 1-1/2 1-1/ TR8X4NM 8 1-1/4 3/ R208X4NM 8 1-1/4 1-1/ TR10X4NM / R2010X4NM TR12X4NM 12 3/4 1/ R2012X4NM 12 3/4 3/ R2016X4NM 16 1/2 1/ R2020X4NM 20 3/8 3/ Pitch Line Backing Length Face Width Overall Thickness L-21

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