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TECHNICAL ADVISOR

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Merkle-Korff offers standard and custom output shafts to meet a varying range of customer specifications. The most commonly used machining and dimensional configurations are shown below as standard offerings.

Custom machining and dimensions to meet varying specifications are available on request.

Merkle-Korff offers a variety of shaft materials including cold rolled and stainless steel. The company also offers special finishes such as black oxide and value-added services such as heat treating.
The majority of gearboxes are available with 1/4", 5/16" and 3/8" diameter output shafts. The Merkle-Korff GF Series is available up to 1/2" diameter. The LY Series up to 5mm diameter. Metric dimensioning on all shafts is available as required.
     Custom lengths are available on both single and double shaft extensions.
Type Description Dimension A Dimension B Dimension C Dimension D
  Shaft Diameters 1/4" 5/16" & 3/8" 1/4" 5/16" & 3/8" 1/4" 5/16" & 3/8" 1/4" 5/16" & 3/8"
F

T

W



H

K

S 		Flat

Tongue

Woodruff Key



Hole

Square Key

Slot 		.046" ±.005

.085" / .087"

ANSI STD.
NO. 202.5
(1/16"x5/16")

.094" / .097"

Nom.Key Width
1/16"
.094" / .097" 		.046" ±.005

.116" / .118"

ANSI STD.
NO. 204
(1/16"x1/2")

.125" / .128"

Nom.Key Width
3/32"
.125" / .128" 		EXT MINUS
.062" / .077
.151" / .161"


.108" / .113"

EXT.
/2 ±.005"

.035" / .040"

.151" / .161"
 EXT MINUS
.062" / .077
.182" / .192"


.170" / .175"

EXT.
/2 ±.005"

.053" / .058"

.182" / .192"




.615"
/.0630"



.0615"
/ .0630"




.615"
/.0630"



.0928"
/ .0943"



EXT.
/2




EXT. Minus
.156"±.015"
-.000



EXT.
/2




EXT. Minus
.281"±.015"
-.000
 
Plastic output shaft configurations are available on Merkle-Korff plastic gearmotors as noted
 

  • Available with the D26 Series plastic
    gearmotor
  • Versatile configuration
  • Integral square drive provides quick
    and easy installation when coupling to a
    square female hole
  • Can be used without set screws in certain
    applications
  • Available with the D47 and D26 Series plastic
    gearmotors
  • The double square is the most common
    output configuration
  • Accepts standard 1/4" square stock shafts
  • Ideal for most applications including valves
    and vending
  • Available with the D26 and D47 Series plastic
    gearmotors
  • Ideal for applications using stock components
    having a 5/16" diameter through-hole and
    set screw

 

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