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GMF-W (round flange double-wide type) - page 3 / 8

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SPECIFICATIONS

Allowable Load NB's GM Slide Bush is classified into either a Single or Double-Wide type in terms of the outer cylinder length. Table 1 below lists comparative allowable loads. A Double-Wide Slide Bush is recommended if the Slide Bush is expected to withstand moment loads.

series

basic dynamic

basic static

allowable static

load rating

load rating

moment

1

1

1

1.6

2

Approx. 4

1.6

2

Approx. 6

1.6

2

Approx. 21

Table 1: Comparison of allowable loads

GM single type GM double-wide type *SM double-wide type

  • *

    Triple-wide type

Note: Single type is assigned a load of 1 for comparison purposes only.

  • *

    SM-series reference values

clearance

transition

clearance

fit

fit

fit

g6

h6

H7

g6

H7

Table 2: Recommended F

series

accuracy grade

GM GM-W

High High

INSTALLATION

it for Single and Double-Wide Types

shaft

housing

Figure 3: Recommended Flange Installation

series

accuracy

GMF-W GMK-W GMT-W

grade High High High

Table 3: Recommended Fit

for Double-Wide Type with Flange Type

shaft clearance fit g6 g6 g6

Figure 4: Recommended Installation method

A flange type Slide Bush is most commonly inserted into a hole with a dimension larger than its outer cylinder. An H7 bore tolerance is recommended for applications that require the steel outer cylinder to be used as the pilot. Additionally, the GM type flange installation should be performed as illustrated in Figure 3. The resin outer cylinder portion must not be used as a pilot.

d2

d1

d2=D-(0.3~1) D:outer diameter of outer cylinder d1=dr-(0.3~1) dr:inner contact diameter

Installation Notes When inserting the GM Slide Bush into a housing, apply an even force to the end of the outer cylinder using a jig such as shown in Figure 4. Handle careful as a precision component; do not subject to strong shocks by dropping or hammering on the resin outer cylinder. When using two or more shafts, it is very important to maintain the parallelism between shafts, as this will greatly affect the smoothness of movement and component life. Adjust the parallelism as needed to achieve smooth movement during the operation of a GM Slide Bush.

2

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