Spur gears with clamping sleeve / contact angle 20 degrees

Specifications/Overview

■Features of surface pressure gears ·Easy to assemble and disassemble and can be used multiple times. ·Easy to adjust the mounting position of the rotating body. ·Additional machining to shafts such as keyway is not required and is inexpensive, and the strength of shafts is not compromised. ·It is rattle-free and resistant to vibration and shock.

Bushings

■Installation (1) Wipe dust off shaft surface and apply oil or grease.   (Do not use any oil or grease containing molybdenum type wear reduction agents.) (2) Wipe off and apply oil or grease on contact surfaces of spur gear and bushing.     Apply oil or grease to threads and seat of screws as well. (3) Temporarily assemble spur gear and bushing and insert the shaft.   (Do not tighten the screws on the bushing before inserting into shaft.) (4) After locating the gear on the shaft, tighten the clamping screws using a torque wrench in the diagonal pattern order, beginning lightly (approximately 1/4 of the specified tightening torque). (5) Tighten the screws further to an increased torque (approximately 1/2 of specified torque). (6) Tighten to the specified full tightening torque. (7) Finally, tighten the screws to the listed torque values in a circular order.

■Cautions on Installation ·When installing, be sure to apply oil or grease. 　When oil or grease is not applied, shaft may slip because of inadequate tightening. · Tighten the bushing screws after inserting the shaft.  (Bushing may deform if the screws are tightened before inserting the shaft.) · Use torque wrench to tighten screws. ·Do not use screws other than those included. ■Removal · Be sure the system is completely shut down before starting work. · Loosen the tightening screws in circumferential order. · Insert a screw in a screw hole for removal and tighten evenly. · Repeat the installation procedure for re-installation.

* 3 Tightening Screw Type 4 Tightening Screw Type 6 Tightening Screw Type [!] Operating Temperature: －20 to +80°C
[ ! ] No Slits on SH Bushings.
*: * SH bushings have tapped holes for removal in 3 places.

 

[M]Material: EN 1.1191 Equiv.
              Screw: EN 1.7220 Equiv. (Black Oxide)

General Information - Spur Gears

Selection details of spur gears

- Material: steel, stainless steel, sintered steel, nylon, polyacetal, brass, aluminum, cast iron

- Coatings: burnished, nickel-plated

- Heat treatment: induction hardened

- Shaft diameter tolerances: H7, H8

- Tooth flank clearance: N5, N7, N8, N9, N12

- Module: 0.3, 0.5, 0.75, 0.8, 1, 1.25, 1.5, 2, 2.5, 3, 4, 4.5, 5, 6, 8, 10, 15, 20

- Pressure angle: 20°

- Shaft diameter: 2 mm to 50 mm

- Number of teeth: 8 to 200

- Tooth width: 2 mm to 90 mm

Description/Basics

The spur gears offered are generally machine elements that serve the non-slip transmission of force, movement transmission or movement change. The teeth of the cylinder wheels grip each other during transmission and largely roll over the tooth flanks. The tooth shape of the spur gear is convexly shaped in the shaped tooth system. At the beginning of the intervention, a rolling resistance acts on the tooth flank, which becomes a sliding friction in the course of the rotation.

A combination of gear wheels and rack gears is useful in the construction of rack gear. This allows motor rotary motion or other rotary motion to be converted into linear motion. rack gear boxes are theoretically possible in an endless assembly. Limits here only set the length of the rack gears for the rack gear drive.

Gear wheels with straight gearing are particularly suitable for the construction of gearboxes. The advantage of straight gearing as opposed to helical gears, is the possibility of transmitting a higher torque. It should be noted that with increasing speed within the transmission ratio or reduction, the torque to be transmitted decreases.

When designing spur gear pairs, the ratio of the gear ratio (number of teeth) and the module of the respective gear wheels must be observed.
The backlash is another important factor that must be considered during construction. Reverse play is understood as the result of the play that the change in the direction of rotation of a single gear wheel pair between the teeth. The risk of reverse play can be reduced if either the diameter or the number of teeth of the cogwheel pairing do not deviate too much from one another. If high wear is to be expected due to the pairing of gears, the MISUMI online shop offers gears with a hardened key-type.

For applications with the same rotational direction, it is possible to use an intermediate gear with integrated bearing on a cantilever shaft. The bearing number used can be found under the tab More Information. An overview of tolerances and permissible radial bearing deviations can be found in the following PDF.

In addition to gear wheels, MISUMI also offers suitable rotary shafts for the construction of a transmission. The straight front wheels can be assembled on these and secured with a set screw or machine keys (key with adjusting screw). This PDF provides an overview of the configurable mountings for the shaft rotation and keyway tolerances.
The continuous adjusting of a spur gear can be realized, among other things, by means of a clamping sleeve. The MISUMI online shop offers spur gears with clamping sleeve. Alternatively, we also offer individual keyless bushing that you can customize to your needs.

Application Examples - Spur Gears

Application example - spur gear with rack gear
(1) Spur gear, (2) Clamping knobs, (3) Rack gear

Application example - spur gear
(1) Spur gear, (2) Workpiece, (3) Rollers

Industrial Applications

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry