...It seems tractor tread design has been the same since the steam tractor days... Not true. Tractor and tire engineers had always been working on tread designs. FORD wanted a universal tread that would work in every soil condition. When the 9N Ford-Ferguson was released in June, 1939, the rear tires had 9 x 32, 45 DEG closed center bars. The fronts used a 4 x 19 single rib tire. Look at early steel wheels and some also had a single rib. Charles Goodyear discovered Vulcanization by accident in the 1830's and that changed tire manufacturing forever. Ford used BF Goodrich on the Model A, the first US auto to travel across the USA. Henry Ford and Harvey Firestone were good buddies, half of part of their Vagabonds group, and both men constantly working on a better tire. In 1940 the rear tire was now 10 x 28 and still 45 deg closed center bars but by 1941 were changed to 27.5 deg open centers. In July 1947 the new 8N Model was released and now used a closed center bar tread that had a 23 DEG design. This style was only used for two years, 47-49. In 1950 the design was changed to a 23 DEG open bar design. Steel wheels were used on tractors since the dawn of man but when rubber was discovered, it was new to everybody, so trial and error was the method used. FORD also had a tire plant at the Rouge but was soon dismantled and machinery sent the USSR. Besides FORD and FIRESTONE, BF GOODRICH were also a supplier.
FORDSON TRACTOR ON STEEL WHEELS, NOTE SINGLE RIB FRONTS:
EARLY FORD 9N 9 TRACTOR REAR 9 X 32 TIRE w/ 45 deg CLOSED CENTER BAR:
EDSEL FORD DEMONSTRATES PLOWING WITH THE NEW 9N TRACTOR. NOTE- 9 X 32 REARS, w/45 deg CLOSED CENTER BARS, and 4 X 19 SINGLE RIBBED FRONTS:
1940 FORD 10 X 28 REAR TRACTOR TIRE:
FORD/FIRESTONE SPECIAL TREAD USED ON 9N INDUSTRIAL MODELS:
NOTE: LATER THESE WERE DUBBED 'TURF TIRES', USED ON GOLF COURSES & SUCH
FORD-FERGUSON 2N 'WARHORSE' MODEL ON STEEL WHEELS:
1948 FORD 8N TRACTOR w/ REPRODUCTION FIRESTONE CHAMPION 'SPADE GUIDE GRIP' CLOSED long bar BAR CENTERS, USED ONLY 47-49:
MODERN FIRESTONE CHAMPION SPADE GRIP 23 deg BAR:
FORD/FIRESTONE THE 5.50 & 6.00 X 16 FRONT TIRES AS OPTIONS FOR USE WITH FELS, INTRODUCED WITH THE 8N:
MODERN FIRESTONE 11.2 X 28 'FIELD & ROAD' w/23 OPEN CENTER BAR TIRES:
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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