Zero Speed Switch Installation Accessories

Speed Switch devices coupled to a corresponding shaft must be properly mounted and aligned to avoid putting extra load on DAZIC bearings, which may cause premature failure. DAZIC bearings will last longer and require the use of installation accessories such as Mounting Brackets and K-Couplings to provide a secure foundation and eliminate misalignment connection problems.


Mounting Bracket

Speed Switch MB-1 MB-2
2100 Series ✔
4100 Series ✔
8100 Series ✔
2100 EP Series ✔
8100 EP Series ✔


The K-Coupling® is made of double-loop ELASTACAST® polyurethane elastomeric material assembled to zinc plated steel hubs, which mount to shafts using Allen screws. Motor noise and vibration will be dampened. Bearings will last longer and require less maintenance.

How To Order

When ordering, make sure the torque requirement is within rating limits, and always include the bore size for both ends of the coupling, which may not be the same.

Example: 5801 1/4″ x 5/16″


  • Bore tolerances are AGMA Class 2 – 000 + .002
  • All standard coupling hubs are zinc plated steel

Keyways may be obtained on Series 5803 and 5804 couplings for an additional cost.

Standard keyways are: 1/8″ for 1/2″ dia. shaft; 3/16″ for 9/16″ and 5/8″ dia. shafts

Stub Shaft

STSH-500 Stub Shaft

Part No. Shaft Diameter (A) Thread Size (B)
STSH-500 1/2″ (12.70 mm) 1/2-13 UNC-2A
STSH-625 5/8″ (15.88 mm) 5/8-11 UNC-2A

Stub Shaft includes one Jam Nut