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SECTION I - GENERAL DESCRIPTION
Figure 1-1. Views of Various Air Hoist Models
12021C
1-1. GENERAL. BUDGIT Air Hoists are precision built chain
type hoists which are built in three rated loads, 1/4, 1/2, and 1
ton. Each size is available in pull cord control and pendant
throttle control models. In addition, there are model variations
with coil type or roller type load chains and hook or lug type
suspensions. Coil chain hoists are also provided in spark
resistant models. (Note: Spark resistant models have rated
loads of 3/8 and 3/4 ton.)
1-2. BASIC CONSTRUCTION. All sizes and models are of the
same basic design, having many common and interchangeable
parts. They consist primarily of an aluminum alloy frame which
houses a vane type air motor, chain sprocket wheel, and
gearing. A shoe-type brake is mounted on one end of frame
and is encased in an aluminum alloy end cover. A control
head assembly with built-in muffler and air inlet swivel
connection is mounted on opposite end of frame. An upper
suspension hook or lug bracket is attached to the top of the
frame. Either a special nickel steel roller type load chain or an
alloy steel coil type load chain with spring-latch type lower
block assembly is employed to raise and lower loads. A block
and chain operated limit stop lever is mounted at bottom of
frame and is pinned to throttle valve control shaft. Hoist
operation is controlled by either pull cords or a pendant throttle
control assembly.
1-3. DIFFERENCES BETWEEN MODELS AND SIZES. The
main differences between hoist models are in the type of
control, type load chain and type suspension employed. These
are described in paragraphs (a.) through (c.) below. Differences
between sizes are in reeving of the load chain. On 1/4 and 1/2
ton hoists, the load chain is single reeved (one part of chain);
on 1 ton hoists, the chain is double reeved (two parts of chain).
12018C
12019C
12020C
Standard lift is 10' though increased lifts may be ordered.
a. Control differences are in methods employed for operating
hoist. There are two types, pull cord control and pendant throttle
control. These are further described in Section III, paragraphs
3-1 and 3-3.
b. Two types of load chains are used as the lifting medium,
roller chain and coil chain. The roller type chain is a special
precision manufactured nickel steel chain. The coil type chain
is full-flexing, electric welded, link chain; carburized alloy steel
on standard models and surface hardened chrome-nickel
stainless steel on spark resistant models. Both types are
especially designed for use in hoisting.
c. Suspension differences include a conventional hook type
mounting and a lug type mounting. Hook suspension allows
portability, permitting hoist to be easily moved from job to job.
Lug suspension allows rigid trolley mounting of hoist on an
overhead I-beam to permit traversing hoist and load. Rigid
mounting of trolley on hoist affords maximum headroom
advantage, saving up to 3-3/16" compared to a hoist hook-
suspended on a trolley.
1-4. HOIST DATA.
*Rated Loads: 1/4, 1 /2 and 1 ton
Air Pressure (recommended): 90 psi
Air Consumption: 48 cfm at 90 psi
Net Weight (basic hoist): 36 pounds
Suspension: Hook or lug
Control: Pull Cord or Pendant Throttle
*For standard models. Spark resistant models are rated at 3/8
and 3/4 ton.
