Here's what you need to know about the exact belt sizes for your Kirby vacuum in diameter and such... as taken from my 1981 Southwest Manufacturers & Distributors parts catalog.
1590
Models: 505 to 515
Outside Diameter (approx.): 2-3/4" (6.98mm)
Belt Type/Width: Flat, 5/8" (1.59mm)
159056
Models: 516 to Tradition
Outside Diameter (approx.): 2-9/16" (6.51mm)
Belt Type/Width: Flat, 5/8" (1.59mm)
301262, 301279
Models: 516 to Tradition (power polisher and Rug Renovator)
Outside Diameter (approx.): 2-9/16" (6.51mm)
Belt Type/Width: Flat, 5/8" (1.59mm)
And the very old C-series belts (models 2C, 3C, 4C and the early 505 with no in-built belt lifter) were:
Outside Diameter (approx.): 2-3/4" (6.98mm)
Belt Type/Width: Flat, 1/2" (1.27mm)
And here's how big the Royal metal upright belt (1-043260-001, as used on machines less than 6 amps) was:
Outside Diameter (approx.): 2-5/8" (6.67mm)
Belt Type/Width: Flat, 1/2" (1.27mm)
~Ben[this post was last edited: 2/14/2019-19:04]
1590
Models: 505 to 515
Outside Diameter (approx.): 2-3/4" (6.98mm)
Belt Type/Width: Flat, 5/8" (1.59mm)
159056
Models: 516 to Tradition
Outside Diameter (approx.): 2-9/16" (6.51mm)
Belt Type/Width: Flat, 5/8" (1.59mm)
301262, 301279
Models: 516 to Tradition (power polisher and Rug Renovator)
Outside Diameter (approx.): 2-9/16" (6.51mm)
Belt Type/Width: Flat, 5/8" (1.59mm)
And the very old C-series belts (models 2C, 3C, 4C and the early 505 with no in-built belt lifter) were:
Outside Diameter (approx.): 2-3/4" (6.98mm)
Belt Type/Width: Flat, 1/2" (1.27mm)
And here's how big the Royal metal upright belt (1-043260-001, as used on machines less than 6 amps) was:
Outside Diameter (approx.): 2-5/8" (6.67mm)
Belt Type/Width: Flat, 1/2" (1.27mm)
~Ben[this post was last edited: 2/14/2019-19:04]