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Rack and Pinion Gears Specifications

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Gear Type




   Gear Type       
   Your choices are...
 
      
 
   Rack
 
     Straight component with gear teeth; typically straight-toothed; mates with pinion (spur gear).
 
   Pinion
 
     Pinions are drive gears use to drive racks or larger gears.  They can be physically similar to spur gears, and occasionally helical gears.  The "pinion" designation is primarily one to indicate that it is the driving gear in a rack and pinion configuration.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Tooth Form       
   Your choices are...
 
      
 
   Straight Teeth
 
     Tooth axis is parallel to axis of rotation.
 
   Helical Teeth
 
     Spiral or helical teeth curve along face.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Number of Teeth:
 
     Number of teeth, along with desired pitch diameter, will dictate pitch or module of gear.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Design Units       
   Your choices are...
 
      
 
   English
 
     English gears use design units such as inches and fractions of inches; they also employ diametral pitch (DP) or circular pitch (CP) as tooth pitch designations.
 
   Metric
 
     Metric gears are made with design units of millimeters (mm), and the pitch is designated as a module, or metric distance between teeth.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Pressure Angle:      Pressure angle is the angle between the line of force or action and the tangent to the pitch circle at the point of mesh. The most common pressure angles for gears are 14.5° and 20°, while some worms and worm gears utilize a 25° pressure angle. Gears must have the same pressure angle to mesh.
   Your choices are...
 
      
 
   14.5°
 
      
 
   20°
 
      
 
   25°
 
      
 
   Other PA
 
      
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Gear Features       
   Your choices are...
 
      
 
   Anti-backlash
 
     Anti-backlash gears have a mechanical assist such as a spring to take up any play between meshing gear teeth, thus avoiding backlash when gear direction changes.
 
   Ground Teeth
 
     Ground teeth provide smoother, higher-precision tooth form.
 
   Integral Rack and Rail
 
     Rack teeth are machined or ground directly onto the moving element to increase power transmission efficiency.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
English Size Specifications




   Pitch Diameter:
 
     Pitch diameter is diameter of tooth drive action.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Face Width:
 
     Face width is width of the teeth (or length of a worm thread).
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Length:
 
     Length of a rack or piece of gear stock. Not a valid specification for other gear styles.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Bore Diameter (if applicable):
 
     Diameter of desired center bore through gear.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Shaft Diameter (if applicable):
 
     Diameter of desired non-separable center shaft.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
Metric Size Specifications




   Pitch Diameter:
 
     Pitch diameter is diameter of tooth drive action.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Face Width:
 
     Face width is width of the teeth (or length of a worm thread).
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Length
 
     Length of a rack or piece of gear stock. Not a valid specification for other gear styles.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Bore Diameter (if applicable):
 
     Diameter of desired center bore through gear.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Shaft Diameter (if applicable):
 
     Diameter of desired non-separable center shaft.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
Material




   Metal:       
   Your choices are...
 
      
 
   Aluminum
 
     A bluish silver-white, malleable, ductile, light, trivalent, metallic element that has good electrical and thermal conductivity, high reflectivity, and resistance to oxidation.  Lighter and less strong than steel.
 
   Brass
 
     Brass comes with good strength, excellent high temperature ductility and reasonable cold ductility, good conductivity, excellent corrosion resistance, good bearing properties and low magnetic permeability.
 
   Bronze
 
     Bronze is a copper base alloy metal composed of copper as the main alloying metal and one or more other metals, such as tin, zinc, or phosphorus.  Silicon bronze is one typical bronze alloy.
 
   Cast Iron
 
     Cast iron is a very durable iron alloy with high amounts of carbon. This category includes ductile iron, gray iron and white cast iron grades. Differences in grades are due to variations in composition and processing.
 
   Carbon / Alloy Steel
 
     A commercial iron that contains carbon in any amount up to about 1.7 percent as an essential alloying constituent. Many grades of carbon and alloy steel are used as fastener materials; may require coating to protect against corrosion.
 
   Hardened Steel
 
     Steel may be hardened in a number of ways, including a variety of quenching techniques in oil and water, being passed through induction chambers, etc. Quickly cooling steel during processing freezes, traps and packs the carbon atoms inside the shrunken iron crystals, thereby producing a very hard and brittle metal. Although very hard, it cannot absorb much shock or impact without breaking.
 
   Stainless Steel
 
     Stainless steel is chemical and corrosion resistant and can have relatively high stress ratings.  Many grades used in fasteners; often does not require anti-corrosion coating, but most stainless steels cannot be hardened to the same degree as carbon steels.
 
   Other Metal
 
     Unlisted, specialized, or proprietary metal or alloy.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Plastic:       
   Your choices are...
 
      
 
   Acetal
 
     Acetal is a stable plastic material with inherent self-lubricating properties that can be enhanced with lubricating fillers.
 
   Delrin
 
     Delrin is an engineered plastic with a good combination of toughness, stiffness, wear and abrasion resistance, and low frictional characteristics.
 
   Nylon
 
     Nylon, comprising several grades of polyamides, is a general-purpose material in wide use; it is tough and resistant and has good pressure ratings. 
 
   Polycarbonate
 
     Polycarbonate is an extremely tough polymer that can be machined to close tolerances.  Lubrication is sometimes needed, as the wear properties of polycarbonate are not as good as some other polymers.
 
   Other Plastic
 
     Unlisted or specialized polymer or plastic material.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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