AMH LA008 Mode D'emploi page 29

Dist: adirsw
Description: Ratcheting screw type mechanical load brake
Proven Design: Some of the famous brands and models utilizing this same technology
Budgit
Models 602
653
How it works: The torque required to hold a load by the (3) pinion shaft, is transformed into a
clamping force on the brake friction disk (17) and pawl ratchet plate (18) by the rotating screw
connection between the pinion shaft (3) and the brake driver (20). The larger the load, the more
screw clamping force is applied to the brake. The double pawls (14) and pawl ratchet plate (18),
clamped between the friction disc (17), ground the brake torque to the hoist frame (12). The
ratcheting pawls allow one way rotation in the pull/lift direction. To lower the load, force must be
applied by the lever handle (44) to the brake driver (20), opposite of the torque generated by the
load, allowing the brake clamping force to lessen, slip the friction disc and allow the load to pay
out. The brake responds proportionally to torque so there is precise control for inching loads.A
light spring (16) is present to apply a small force opposing the clamping force. When the hoist is
not loaded this allows the brake to release when the "Free Chain Knob" (28) is turned in the
ALL MATERIAL HANDLING INC. ● 900 N. Franklin, Suite # 401 ● Chicago, IL 60610
Web: www.allmaterialhandling.com ● E-Mail: Sales@allmaterialhandling.com
PH# (312) 698-8658 ● Toll Free# (877) LIFT AMH ● FAX # (312) 274 9780
Lever Chain Hoist
Automatic Load Brake Operation
Coffing CM
LSB 602
TB602 637
653
IR JET Tractel
SLB #10-2 Bravo
SLP
VP
SB002
Bulletin:
Date: 03/23/09
Page: 1 of 2
By: T. Gagnet
Yale
PSB