How Co-Axial Couplings Work The co-axial coupling consists of three parts. The outer hub consists of a series of rare earth magnets that are ground, potted and attached to the inside diameter of a steel hub. The inner hub consists of a series of rare earth magnets that are ground, potted and attached to the outside diameter of a steel rotor. The inner hub is then completely sealed in stainless steel to protect the magnets and rotor from damage or corrosive substances. Typically there is a radial air gap of up to .275” (7mm) between the inner and outer hubs. Conventional bores and keyways are used to drive the inner and outer hubs.

Specifications - Shown in English measure
(Click here for Metric)

Note: The dimensions and ratings for all co-axial type couplings are shown using only NdFeB type rare earth magnets. Ratings and dimensions may vary for the SmCo versions.

Advantages of Co-Axial Type Couplings • Eliminates Rotating Seals • No Wearing Parts • Synchronous Design, No Slip at Any Speed • No Physical Contact Between Driving and Driven Parts • Custom Designs Available MTC-0.1 thru MTC-10     INNER HUB   OUTER HUB Part Number Max Speed (rpm) Total Weight (lb) Nominal Torque (in/lb) Peak Torque (in/lb) A (in) B (in) C (in) D (in) E (in) F (in) G (in) H (in) I (in) MTC-0.1 44000 0.2 1.0 1.75 0.50 0.197 0.28 0.59 0.236 0.71 1.02 0.75 1.18 MTC-0.3 26000 0.6 2.6 4.5 0.87 0.315 0.31 0.63 0.315 1.10 1.73 0.87 1.42 MTC-1 22000 1.7 9 13 1.10 0.394 0.47 0.79 0.394 1.38 2.13 1.10 1.73 MTC-3 18000 2.2 27 30 1.38 0.472 0.63 0.98 0.472 1.69 2.52 1.38 2.20 MTC-10 13000 5.5 90 105 2.28 0.630 0.79 1.38 0.787 2.60 3.54 1.97 3.15

MTC-16 thru MTC-140     INNER HUB   OUTER HUB Part Number Max Speed (rpm) Total Weight (lb) Nominal Torque (in/lb) Peak Torque (in/lb) A (in) B (in) C (in) E (in) F (in) G (in) H (in) I (in) J (in) K (in) L (in) M (in) N (in) O (in) MTC-16 13000 6.6 140 230 2.28 1.02 0.551 0.79 2.44 0.20 0.64 2.60 1.57 0.748 3.54 4.72 0.24 0.86 MTC-22 9400 16 200 310 3.47 1.97 0.787 1.18 1.97 0.24 0.90 3.82 1.97 0.945 4.88 4.72 0.31 1.07 MTC-30 9400 18 265 425 3.47 1.97 0.945 1.18 2.44 0.31 1.07 3.82 1.97 1.102 4.88 5.12 0.31 1.23 MTC-50 7300 26 450 708 4.80 3.15 1.181 1.18 1.97 0.31 1.31 5.20 2.36 1.496 6.30 5.12 0.39 1.63 MTC-65 7300 33 575 885 4.80 3.15 1.181 1.57 2.56 0.31 1.31 5.20 2.36 1.496 6.30 5.71 0.39 1.63 MTC-80 6500 42 710 1151 5.59 3.54 1.378 1.57 2.56 0.39 1.51 5.98 3.15 1.654 7.09 6.50 0.47 1.78 MTC-110 6500 48 1000 1460 5.59 3.54 1.378 1.57 3.15 0.39 1.51 5.98 3.15 1.654 7.09 7.09 0.47 1.78 MTC-140 6500 64 1250 1859 5.59 3.54 1.575 1.57 4.33 0.47 1.70 5.98 3.15 1.890 7.09 8.27 0.55 2.04

MTC-180 thru MTC-280     INNER HUB   OUTER HUB Part Number Max Speed (rpm) Total Weight (lb) Nominal Torque (in/lb) Peak Torque (in/lb) A (in) B (in) C (in) D (in) E (in) F (in) G (in) H (in) I (in) J (in) K (in) L (in) M (in) MTC-180 6200 51 1600 2567 5.59 3.54 1.575 2.36 1.97 5.51 0.47 1.72 5.98 6.142 6.69 7.48 7.09 MTC-220 6200 57 2000 2921 5.59 3.54 1.890 2.76 2.36 6.30 0.55 2.06 5.98 6.142 6.69 7.48 7.87 MTC-280 6200 66 2500 3363 5.59 3.54 1.890 3.54 2.36 7.09 0.55 2.06 5.98 6.142 6.69 7.48 9.06

Technical Data
Inner Cylinder		300 Stainless Steel, Hermetically Sealed
Outer Cylinder		Mild Steel, All Magnets Encapsulated
Magnet (Nickel-Plated)		NdFeB*
Operating Temp*		140C (284F)
*Note: Co-Axial couplings are also available with SmCo magnets, rated up to 280C (536F)

Optional Containment Barrier An optional stainless steel barrier can be used to separate the atmosphere or fluids surrounding the inner and outer hubs. This eliminates the need for a rotating shaft seal. Both standard and custom barrier designs up to 75 hp are available. All sizes over MTC-10-SB are made to order. All designed applications are economically produced, even in small quantities.     STOCK CONTAINMENT BARRIER     Part Number A (in) B (in) C (in) D (in) E (in) F (in) G (in) H (in) J (in) K (in) # of Holes MTC-0.1-SB 1.42 1.102 0.79 0.591 1.02 1.10 0.16 0.24 0.039 0.18 4 MTC-0.3-SB 1.93 1.575 1.18 0.945 1.18 1.26 0.20 0.28 0.039 0.22 4 MTC-1-SB 2.17 1.811 1.42 1.181 1.38 1.46 0.20 0.28 0.039 0.22 6 MTC-3-SB 2.60 2.165 1.73 1.496 1.77 1.97 0.26 0.39 0.039 0.26 6 MTC-10-SB 3.78 3.268 2.87 2.362 2.36 2.60 0.59 0.24 0.039 0.26 6

Note: The MTC-0.1 through -10 containment shells are 316 stainless, and are rated to a minimum of 450 psi. Containment shells for other sizes are made to order and are rated according to customer requirements.