KHK Stock Gears for Sale
Just as the name suggests, stock gears are defined as gears which are always stocked.
When the gears of machines in operation break, the person in charge of the maintenance of the machines can immediately replace them if gears of the same shape are in stock at a supplier’s base. Also, for the machine designers, when designing machines they can check the specifications of already designed stock gears and adopt stock gears as the gears to use when the specifications of said stock gears match the needs of the machine they are designing. In such cases there is no need for the machine designers to design new gears, and furthermore it is possible to procure the small amount of gears needed to produce a prototype of the machine quickly and affordably.
When considering the convenience of the user, there are a variety of types of stocked gears including spur gears, bevel gears, helical gears, worm gears, and racks as well as a wide variety of needs such as the pitch of gear teeth, the size of gears, materials such as metal or plastic, gear grades (ISO, JIS, DIN, AGMA, etc.), whether teeth face are polished, and whether the gears are tempered.
KHK’s stock gears are largely composed of gears called metric gears, and metric gears make use of a standard called module in the pitch of the gear teeth.
Module : 0.5-10
Hardened / Non-hardened
Ground / Non-ground
Among spur gears, there exist wide variations in terms of the number of teeth, module (pitch of the teeth), accuracy depending on the use of teeth grinding, hardness depending on quenching, material, with or without shaft, method of shaft fastening, etc.
Module : 1-3
Hardened / Non-hardened
Ground / Non-ground
There are wide variations among helical gears in terms of helix angle, twisting direction, reference cross section of gear, etc. Just like spur gears, there are wide variations in terms of number of teeth, module, material, presence or absence of polishing and quenching.
Module : 0.5-3
Non-hardened
Non-ground
Internal gears are the gears which have their teeth inside cylinders or cones and are frequently used in planetary gear mechanisms. The internal gear always meshes with an external gear where the internal gear is always the large gear while the external gear is the pinion. In these cases, involute interferences, trochoid interferences, or triming may occur depending on the number of teeth of the meshing gears.
Module : 0.5-10
Hardened / Non-hardened
Ground / Non-ground
Gear racks are rod-like gears used to turn rotating motion into linear motion, and can be considered as large gears with pitch cylinders of infinite radii. The gear racks are used for machine tools and steering systems of automobiles. Helical racks are gear racks whose tooth traces are diagonal.
Module : 0.5-10
Hardened / Non-hardened
Ground / Non-ground
Miter gears are a type of bevel gears composed of a pair of bevel gears with the same number of teeth and a pitch surface angle of 45°. Just as in bevel gears, there are straight miter gears with straight tooth traces and spiral miter gears with twisted tooth traces. In addition, there are special miter gears called angular miter gears whose shaft angles are not 90 degrees.
Module : 0.5-8
Hardened / Non-hardened
Ground / Non-ground
Bevel gears are conical gears which transmit motion between intersecting axes (two axes intersecting at one point) and categorized into "straight bevel gears" with straight tooth traces and "spiral bevel gears" with twisted tooth traces.
Module : 1-4
Non-hardened
Non-ground
Screw gears are a type of helical gears (cylindrical gears) used between skewed axes, which neither intersect nor are parallel to each other. Screw gears are unsuitable for high-load operations and also need enough lubrication because they transmit motion and rotation by sliding.
Module : 0.5-6
Hardened / Non-hardened
Ground / Non-ground
Worm gears are a pair of small gears used to gain a large speed reduction ratio with skewed axes. Within the pair, the gear with a fewer number and screw-shaped teeth is called the worm while the cylindrical gear with more teeth is called the worm wheel.
Related links :
Types of Gears - A detailed description of Types of Gears
J Series - A detailed description of J Series
Product Specification Changes
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