FCG SPECIAL OPS
facebooktwitterlinkedingoogleplusblog

 

 

OUR CUSTOM GEAR MANUFACTURING CAPABILITIES

 

Analytical Gear Measuring Instrument

 

Crown Hobbing

Forest City Gear has pioneered fine pitch crown hobbing, a unique technology we apply to fine pitch gearing. This process produces a barrel shape on the flank of the gear tooth that compensates for misalignment and reduces noise. This application is especially advantageous with high-speed spur and helical pinions.

Carbide Re-hobbing (commonly referred to as skiving)

Forest City Gear’s carbide re-hobbing process allows us to produce the highest quality gears at a lower cost than grinding. Carbide re-hobbing eliminates distortion caused by heat treating, allowing us to achieve gear quality of AGMA 9 or better. Gears that have been distorted or enlarged during heat treatment can be salvaged with this process.

Analytical Gear Inspection

Forest City Gear’s state-of-the-art analytical inspection equipment shows our commitment to quality. This equipment is capable of checking pitch, runout, lead, and profile error to ten millionths of an inch on spur, helical, worm and worm gears as well as on hobs and shaper cutters. We have performed analytical inspection on gears as fine as 96 diametrical pitch and with diameters up to 35 inches.

Hob Sharpening

Forest City Gear realizes the accuracy of a gear’s profile is determined by the quality of the hob being used to generate the teeth. Our modern hob-sharpening equipment allows us to re-sharpen hobs consistently to class AA tolerances.

Gear and Thread Grinding

Forest City Gear's form grinder offers "Master Gear Quality" for single and multi-thread worms. This machine is capable of handling heavily modified profiles and crowned teeth to 370mm diameter and shafts to a meter in length. For spur and helical gears, we have ground master gears as fine as 80DP from solid or finished roughed gears achieving qualities as high as AGMA 14 or 15 (DiN 2-3) on some parameters, and even better occasionally.

 

 

Types of Gears

 

Gear Type

 

Max O.D.

Diametral Pitch


Thread Grinding

20"

Worm to 4 DP & 34" Length

Gear Grinding

22"

2 DP-96 DP, 22" max diameter

Spur Hobbing

20"

3 DP- 200 DP

Spur Shaping

24"

3 DP-200 DP

Helical Hobbing

20"

3 DP-200 DP

Helical Shaping

24"

3 DP-200 DP

Worm Gear

16"

3 DP-200 DP

Worm

20"

4 DP-200 DP

Sprocket1

20"

3/4" CP (Coarsest)

Spline2

20"

4 DP-200 DP (to 72” length)

Internal

20"

4 DP-200 DP (to 7.75" Facewidth)

 

1  Includes roller, block, silent, and ladder chain type sprockets.
2  Includes tapered, involute, straight-sided and serration type spline shafts, and jump spline shafts.

NOTE: We do not manufacture bevel gears, miters, herring bone, shaved, gear reducers or gear boxes.