MI Series Medium-Duty Ball Transfers

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Switch measurements:
Part Load (lb)Load (kg) Weight BALL ⌀ ″Ball Ø (mm) A B C D E F$ fromFile icon FilesAdd to Cart
PartLoad (lb)Load (kg)$ from
MI12 55 25 0.110 0.050 1/2" 12 0.866 22 0.945 24 0.807 20.5 0.138 3.5 M8 x 1.25 M8 x 1.25 0.197 5 $25.17PDF Step
MI15 132 60 0.163 0.074 5/8" 15 0.945 24 1.102 28 0.906 23 0.197 5 M8 x 1.25 M8 x 1.25 0.315 8 $25.59PDF Step
MI22 397 180 0.560 0.254 7/8" 22 1.417 36 1.594 40.5 1.417 36 0.177 4.5 M8 x 1.25 M8 x 1.25 0.394 10 $28.78PDF Step
MI30 772 350 1.014 0.460 1 3/16" 30 1.772 45 1.843 46.8 1.528 38.8 0.256 6.5 M8 x 1.25 M8 x 1.25 0.394 10 $42.50PDF Step
MI45 1323 600 2.601 1.180 1 3/4" 45 2.441 62 2.500 63.5 1.988 50.5 0.354 9 M8 x 1.25 M8 x 1.25 0.394 10 $111.94PDF Step
MI76 2200 1000 13.360 6.060 3" 76.2 5 127 3.992 101.4 3.075 78.1 0.917 23.3 3.5" x 8 TPI NPSM 3.5" x 8 TPI NPSM 1.467 37.3 $191.44
MI12A 44 20 0.110 0.050 1/2" 12 0.866 22 0.945 24 0.807 20.5 0.138 3.5 M8 x 1.25 M8 x 1.25 0.197 5 $31.11PDF Step
MI15A 110 50 0.163 0.074 5/8" 15 0.945 24 1.102 28 0.906 23 0.197 5 M8 x 1.25 M8 x 1.25 0.315 8 $32.48PDF Step
MI22A 397 180 0.564 0.256 7/8" 22 1.417 36 1.594 40.5 1.417 36 0.177 4.5 M8 x 1.25 M8 x 1.25 0.394 10 $37.30PDF Step
MI30A 772 350 0.992 0.450 1 3/16" 30 1.772 45 1.843 46.8 1.528 38.8 0.256 6.5 M8 x 1.25 M8 x 1.25 0.394 10 $51.45PDF Step
MI45A 1323 600 2.579 1.170 1 3/4" 45 2.441 62 2.500 63.5 1.988 50.5 0.354 9 M8 x 1.25 M8 x 1.25 0.394 10 $154.00PDF Step
MI76A 2200 1000 13.338 6.050 3" 76.2 5 127 3.992 101.4 3.075 78.1 0.917 23.3 3.5" x 8 TPI NPSM 3.5" x 8 TPI NPSM 1.467 37.3 $696.65
MI12D 11 5 0.095 0.043 1/2" 12 0.866 22 0.945 24 0.807 20.5 0.138 3.5 M8 x 1.25 M8 x 1.25 0.197 5 $29.43PDF Step
MI15D 22 10 0.134 0.061 5/8" 15 0.945 24 1.102 28 0.906 23 0.197 5 M8 x 1.25 M8 x 1.25 0.315 8 $31.55PDF Step
MI22D 44 20 0.463 0.210 7/8" 22 1.417 36 1.594 40.5 1.417 36 0.177 4.5 M8 x 1.25 M8 x 1.25 0.394 10 $23.24PDF Step
MI30D 55 25 0.794 0.360 1 3/16" 30 1.772 45 1.843 46.8 1.528 38.8 0.256 6.5 M8 x 1.25 M8 x 1.25 0.394 10 $54.65PDF Step
MI45D 55 25 2.095 0.950 1 3/4" 45 2.441 62 2.500 63.5 1.988 50.5 0.354 9 M8 x 1.25 M8 x 1.25 0.394 10 $168.20PDF Step
MI76D 55 25 10.064 4.565 3" 76.2 5 127 3.992 101.4 3.075 78.1 0.917 23.3 3.5" x 8 TPI NPSM 3.5" x 8 TPI NPSM 1.467 37.3 $696.65
MI22SS Inquire Inquire Inquire Inquire 7/8" 22 1.417 36 1.594 40.5 1.417 36 0.177 4.5 M8 x 1.25 M8 x 1.25 0.394 10 -
MI30SS Inquire Inquire Inquire Inquire 1 3/16" 30 1.772 45 1.843 46.8 1.528 38.8 0.256 6.5 M8 x 1.25 M8 x 1.25 0.394 10 -
MI45SS Inquire Inquire Inquire Inquire 1 3/4" 45 2.441 62 2.500 63.5 1.988 50.5 0.354 9 M8 x 1.25 M8 x 1.25 0.394 10 -
MI76SS Inquire Inquire Inquire Inquire 3" 76.2 5 127 3.992 101.4 3.075 78.1 0.917 23.3 3.5" x 8 TPI NPSM 3.5" x 8 TPI NPSM 1.467 37.3 -
MI1255 25
MI15132 60
MI22397 180
MI30772 350
MI451323 600
MI762200 1000
MI12A44 20
MI15A110 50
MI22A397 180
MI30A772 350
MI45A1323 600
MI76A2200 1000
MI12D11 5
MI15D22 10
MI22D44 20
MI30D55 25
MI45D55 25
MI76D55 25
MI22SSInquire Inquire
MI30SSInquire Inquire
MI45SSInquire Inquire
MI76SSInquire Inquire

Our MI series medium duty range of ball transfer units are machined from solid steel & case hardened for wear resistance. Reinforced machined steel top cap protecting it against impact from any misalignment of conveyed items.

Lubricated for life & zinc plated for resistance to corrosion. Standard materials; Body & cap AISI 1015, Balls AISI 52100. Stainless steel upgrade ‘A’ & ‘SS’ feature AISI420 balls Shock Resistance & body. Main ball sizes ≥19mm incorporate a felt seal to restrict contamination.

This series features a single drain hole. M8 internal securing thread (female).

Low Friction Low Friction
1 : 0,02
Speed Speed
1.5m/sec
Temperature Temperature
-30/+100ºC
Shock Resistence Shock Resistence
Orientation Horizontal / Up

Orientation Horizontal / Up


K & C Type Clips

  • Fixing clips compensate for irregularities in bore and diameter.
  • Ideal where only single-sided access of mounting surface is reachable.

Feature to display below:

Medium Duty Part Bore Ø MIN - MAX A$ fromFile icon FilesAdd to Cart
PartMedium Duty$ from
MI12 K12 0.905 - 0.925 23.0 - 23.5 0.866 22 $2.60
MI15 K15 0.984 - 1.004 25.0 - 25.5 0.945 24 $1.37
MI15 C15 0.976 – 0.984 24.8 - 25.0 0.945 24 $2.16
MI22 K22 1.457 - 1.476 37.0 - 37.5 1.417 36 $1.60
MI22 C22 1.457 - 1.465 37.0 - 37.2 1.417 36 $2.48
MI30 K30 1.811 - 1.831 46.0 - 46.5 1.772 45 $2.22
MI30 C30 1.823 - 1.839 46.3 - 46.7 1.772 45 $3.38
MI45 K45 2.480 - 2.500 63.0 - 63.5 2.441 62 $3.12
K12MI12
K15MI15
C15MI15
K22MI22
C22MI22
K30MI30
C30MI30
K45MI45
clipping diagram
  1. Fit clip to mounting bore.
  2. Push ball unit though clip.
  3. Peripheral tags expand & grip the ball unit.
clip diagram
K-clip Spring Steel
clip diagram
C-clip Spring Steel
clip diagram
Other clips available.

Tolerance Rings

  • Compensate for irregularities in bore & diameter.
  • Ideal where only single-sided access of mounting surface is reachable.

Feature to display below:

Medium Duty Part A Bore Ø MIN / MAX B$ fromFile icon FilesAdd to Cart
PartMedium Duty$ from
MI12 TR20 0.787 20 0.858 - 0.868 21.80 - 22.05 0.472 12 $1.06
MI15 TR24 0.945 24 1.010 - 1.020 25.65 - 25.90 0.591 15 $1.18
MI22 TR36 1.417 36 1.488 - 1.496 37.80 - 38.00 0.472 12 $1.84
MI30 TR45 1.772 45 1.843 - 1.850 46.80 - 47.00 0.591 15 $1.92
TR60 2.362 60 2.445 - 2.453 62.10 - 62.30 0.787 20 $2.38
TR20MI12
TR24MI15
TR36MI22
TR45MI30
TR60
transfer ball unit tolerance ring

Similar Heavy Duty models:

  • Maximum capacity at any angles of orientation.
  • Heavy duty precision machined construction.
  • “Endless track” design – smoothest precision.
  • Service kits & factory spares since 1954.
2 year warranty logo
Subject to usage & conditions.

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