Vestil LM-Boom - Manual (Page 6)

LM-series fork-mountable booms 01/11 rev. 11/14/2013
Page 6 of 28
Copyright 2013 Vestil Manufacturing Corp.
F
IG
. 1B: LM-1T- 4
K
, 6
K
& 8
K
C
ENTERS OF
G
RAVITY AND
M
AXIMUM
L
OAD
R
ATINGS FOR
V
ARYING
L
OAD
A
TTACHMENT
P
OINT AND
B
OOM
E
XTENSION
C
OMBINATIONS
Fig. 1B: LM-1T- 4k, 6k & 8k Centers of Gravity and Maximum Load Ratings for
Varying Load Attachment Point and Boom Extension Combinations
The center of gravity has a vertical component as well as a horizontal component. The vertical center of gravity is
located 15.5 in. (~39.4cm) above the bottom edges of the fork pockets. The horizontal component ranges from 31
inches to 47 inches measured from the outer edges of the fork pockets. As shown in the diagram above:
 Retracted horizontal center of gravity (RHCG): boom fully retracted with a load attached at position A, the
center of gravity is located 31 inches (~79 cm) from the outer edges of the fork pockets;
 Extended horizontal center of gravity (EHCG): fully extended with a load attached at position J, the center of
gravity is located 47 inches (~119 cm) from the outer edges of the fork pockets.
All other combinations (of boom extension and load position) yield horizontal centers of gravity located at or
between RHCG and EHCG.
Model EHCG RHCG VCG
LM-1T-4k 49½ in. (~126cm) 32 5 /
16
in. (~82cm) 13 5 /
16
in. (~34cm)
LM-1T-6k 46 5 /
16
in. (~123cm) 30 5 /
8
in. (~78cm) 12 3 /
8
in. (~31cm)
LM-1T-8k 47 in. (~119cm) 31 in. (~79cm) 15 ½ in. (~cm)
RHCG
VCG
= Center of gravity
Origin
point for
centers
of gravity