PRO MAG GEARS

   A magneto’s drive gear is imperative to the performance of your engine. MSD has put a great deal of effort into researching and testing a variety of metallurgical compositions, heat treating and coatings in order to provide you with the strongest and most accurate gear available.

   MSD engineers have built a “gear dyno” and spent thousands of hours testing and evaluating the metallurgy of our gears. The result is a special alloy iron gear that is treated to a low friction coating process. To you this means long life, a short break-in period and reliable performance!

IRON GEARS

   MSD’s Iron Gears are made from a proprietary formulated ductile iron with an increased outer hardened layer thickness (RC 55-60). They also feature a micro-polished surface and a Melonite QPQ coating for friction reduction.

Note: MSD Chevrolet gears have a 0.500” ID.

 

 

Chevrolet, Standard	PN 8531
Oversized, +0.006”	PN 8532
Ford, 351C/M, 400, 429, 460, FE 0.531” ID	PN 85812
Ford, 351W 0.531” ID	PN 85852

BRONZE GEARS

   MSD Bronze Pro Mag Gears are machined from quality AMPCO 45 aluminum bronze containing 5% nickel. This special combination creates high strength gear teeth that are less prone to wear.

 

 

STANDARD GEARS
Chevrolet	0.500" ID	PN 8471
Ford, 351C/M, 400, 429, 460, FE	0.530" ID	PN 8581
Ford, 351W	0.530" ID	PN 8585

 

BRONZE OVERSIZE GEARS

   Absolute timing accuracy cannot be achieved until every mechanical detail is handled. MSD’s Oversized Bronze Gears help obtain perfect timing by taking up any clearances between the cam gear to achieve proper meshing of the gears.

 

OVERSIZE GEARS
Chevrolet	Part No.	Ford Windsor	Part No.
+0.003"	PN 84721	+0.003"	PN 85855
+0.006"	PN 8472	+0.009"	PN 85856
+0.009"	PN 84722	+0.012"	PN 85857
+0.012"	PN 84723	+0.015"	PN 85858
+0.015"	PN 84724