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Designing Linkages

In determining what type of linkage will best suit your application, there are a number of variables which will affect the overall cost of the linkage assembly. The flowchart below tries to outline our recommended steps in identifying the most cost effective linkage assembly for your application.

Step 1: Misalignment

Decision: Determine if misalignment is required as this determines the type of linkage end required.

TIPS

  • If there's misalignment in the linkage, at least one ball joint or spherical rod end will be required.
  • As yoke and clevis ends cost less than ball joints or spherical rod ends, determine if misalignment is required on one or both ends.
Arrow Pointing Right

Step 2: Thread Size

Decision: Specify the thread size.

TIPS

  • Avoid 7/16" sizes for cost reasons
  • There are minor cost differences between 0-32, 1/4-28, 5/16-24 and 3/8-24 sizes
  • Going from 3/8" to 1/2", 1/2" to 5/8", 5/8" to 3/4" sizes increased the cost dramatically.
  • There is no real cost difference between equivalent inch and metric sizes.
   

Step 4: Linkage End

Decision: Determine the Linkage End to Use

  Listing by ASCENDING cost
Ball Joints Clevis & Yoke Ends Spherical Rod Ends

Increasing Cost (down)

MDB
ES & ESM
ESCH
F
EST & ESTX
QI & QM
SSE
SBJ
SSDMCS
SQI & SQM
Swivel
Clevis, Metric
Yoke, Inch
Clevis, Inch
Female Eye End
Turnbuckle Clevises
Half Clevises
MKF & MKM
MSF & MSM
MPF & MPM
MTF & MTM
MVF & MVM
DNTF & DNTM
DWTF & DNTF
MPFT
MPFTX
CTF & CTM
STF & STM

 

Left pointing arrow

Step 3: Thread Gender

Decision: Specify Male vs. Female Threads

TIPS

  • Female linkage ends are almost always less expensive than male linkage ends. If the linkage end itself has no cost difference for male vs. female, a male connecting linkage is almost always less expensive than a female connecting linkage
 
Left pointing arrow PhotoCan't Decide? Use adaptors to adapt to existing components or special applications.
   Decision between Male and Female Linkages

Step 5: Connecting Linkage - Male

Decision: Select the Connecting Linkage

TIPS

 

 

 

 

Down arrow

Step 5: Connecting Linkage - Female

Decision: Select the Connecting Linkage

TIPS:

   

Standard Rods
Photo

Step 6: Assembly Length Tolerance

  • Class A: ± 0.25" finger tight (least expensive option)
  • Class B: ± 0.25" wrench tight
  • Class C: set, tightened and torqued to your specifications

Midwest Control Products Corp.
590 East Main Street, Bushnell, IL 61422 USA
Ph: (309)772-3163 e-mail: info@midwestcontrol.com Fx: (309) 772-2266

Unit 9 Nimrod Business Park, De Havilland Way, Witney, Oxon OX29 0YG United Kingdom
Ph: +44 (0)1993-849560 e-mail: jforman@midwestcontrol.com Fx: +44 (0)1993-706920

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