Tailift Sales Manual - Worldwide Forklifts

maximum traction varies according to the engine torque, reduction gear ratio, road surface
and other factors. It also varies largely depending
on whether or not the truck is loaded.
Gradeability
The “Gradeability” indicates the ability of the
forklift to ascend a slope. This ability differs
depending on whether it is loaded or not. The unit
of measuring the Gradeability varies from
manufacturer to manufacturer. The conversion
table given below may be utilized for comparison
purposes. The Gradeability of Tailift forklift trucks
is normally expressed in tangent percent (tan 0%).
Gradeability Conversion Table
Degree Fraction tan 0% sin 0% Degree Fraction tan 0% sin 0%
(0) (B/A) (B/A) (B/C) (0) (B/A) (B/A) (B/C)
1 1/57.2 1.8 1.8 24 1/2.2 44.5 40.6
2 1/28.6 3.5 3.5 25 1/2.1 46.6 42.2
3 1/19.1 5.2 5.2 26 1/2.1 48.8 43.8
4 1/14.3 7.0 7.0 27 1/2.0 51.0 45.4
5 1/11.4 8.8 8.7 28 1/1.9 53.2 47.0
6 1/9.5 10.5 10.5 29 1/1.8 55.4 48.5
7 1/8.1 12.3 12.2 30 1/1.7 57.7 50.0
8 1/7.1 14.0 13.9 31 1/1.7 60.0 51.5
9 1/6.3 15.8 15.6 32 1/1.6 62.5 53.0
10 1/5.7 17.6 17.4 33 1/1.5 64.9 54.5
11 1/5.1 19.4 19.1 34 1/1.5 67.4 55.9
12 1/4.7 21.3 20.8 35 1/1.4 70.0 57.4
13 1/4.3 23.1 22.5 36 1/1.4 72.7 58.8
14 1/4.0 24.9 24.1 37 1/1.3 75.4 60.2
15 1/3.7 26.8 25.8 38 1/1.3 78.1 61.6
16 1/3.5 28.7 27.5 39 1/1.2 81.0 62.9
17 1/3.3 30.6 29.2 40 1/1.2 83.9 64.3
18 1/3.1 32.5 30.9 41 1/1.2 86.9 65.6
19 1/2.9 34.4 32.5 42 1/1.1 90.0 66.9
20 1/2.7 36.4 34.2 43 1/1.1 93.3 68.2
21 1/2.6 38.4 35.8 44 1/1.1 96.6 69.5
22 1/2.5 40.4 37.4 45 1/1.0 100.0 70.7
23 1/2.4 42.4 39.0
9
Tailift Sales Manual 2005