GM (single type) GM-W (double-wide type) GMF-W (round flange double-wide type)

Transcription

1 Nippon Bearing has expanded the new generation GM Slide Bush series to now include the popular ouble-ide and Flange Types to provide an even wider selection of products. GM (single type) GM- (double-wide type) GMF- (round flange double-wide type) GMK- (square flange double-wide type) GMT- (two side cut double-wide flange type)

2 NIIPON Bearing's new generation of lightweight, low noise GM Slide Bush series has been expanded to now include the ouble-ide and Flange types with the benefits and features described below. STRENGTH and STABIITY: ouble-ide Type GM- EASY INSTAATION: Round Flange ouble-ide Type GMF- Square Flange ouble-ide Type GMK- Two Side Cut ouble-ide Flange Type GMT- Each of these new products are available in standardized sizes for shaft diameters ranging from through 3. NB's GM Slide Bush series features an outer cylinder "load section" made of hardened steel and a "ball return section" made of resin. The two sections are formed together as one unit resulting in an overall weight reduction of 35 when compared to our traditional SM Slide Bush, while maintaining equivalent accuracies and capacities. The oublewide/flange ouble-wide products have been added to meet the needs of wide variety of application requirements. This new generation Slide Bush will respond to the demands of "low-cost" as well as broaden the application scope of Slide Bush. STRUCTURE AN FEATURES NB's GM Slide Bush consists of an outer cylinder casing, steel balls, and ball retainer. The outer cylinder casing is steel combined with resin and is formed by precision grinding processes. ightweight The GM Slide Bush makes efficient use of resin components making it possible to achieve an overall weight reduction of 35 when compared with the SM Slide Bush. Compact Size The GM- Slide Bush is shorter in overall length when compared with the SM- Slide Bush, while maintaining equivalent rated loads. This allows for full use of installation space and stroke. ow Noise esign The ball return section is configured completely in resin material, which provides for low noise operation. Figure 1: Structure of GM/GM- slide bush resin outer cylinder retainer steel outer cylinder ball element Smooth Movement, High Acceleration/eceleration Support The GM Slide Bush provides smooth movement under high acceleration/deceleration motion through the accurately lined-up circulation of the balls, a lightweight structure. Product Configurations The GM Slide Bush series is now available in three main types: Single, ouble-ide, and ouble-ide with flange. Each type is available for shaft diameters ranging from through 3. The ouble-ide Flange type may be provided with either Round, Square, or Two Side Cut flanges. Seal An optional integral resin seal is also available. Figure 2: Structure of GMF- slide bush retainer steel outer cylinder with flange resin outer cylinder ball element seal seal 1

3 SPECIFICATIONS Allowable oad NB's GM Slide Bush is classified into either a Single or ouble-ide type in terms of the outer cylinder length. Table 1 below lists comparative allowable loads. A ouble-ide Slide Bush is recoended if the Slide Bush is expected to withstand moment loads. Table 1: Comparison of allowable loads series GM single type GM double-wide type *SM double-wide type * Triple-wide type basic dynamic load rating 1 Note: Single type is assigned a load of 1 for comparison purposes only. * SM-series reference values Table 2: Recoended Fit for Single and ouble-ide Types series GM GM- INSTAATION accuracy grade High High shaft clearance transition fit fit g h g housing clearance fit H7 H7 Table 3: Recoended Fit for ouble-ide Type with Flange Type series accuracy shaft grade clearance fit GMF- High g GMK- High g GMT- High g A flange type Slide Bush is most coonly inserted into a hole with a dimension larger than its outer cylinder. An H7 bore tolerance is recoended 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. Installation Notes hen 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. Handle careful as a precision component; do not subject to strong shocks by opping or haering on the resin outer cylinder. hen 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. basic static allowable static load rating moment Approx. 2 Approx. 2 Approx. 21 Figure 3: Recoended Flange Installation Figure : Recoended Installation method d2=-(.3~1) :outer diameter d2 d1 of outer cylinder d1=-(.3~1) :inner contact diameter 2

4 GMTYPE Single-Type part structure example GM 12 UU GM type inner contact diameter Seal Blank without seal UU seals on both sides B 1 major dimensions basic load rating part B 1 dynamic static mass of ball tolerance tolerance C Co circuits m m N N g GM GM GM GM GM GM ,18 5 GM ,37 7 GM , GM ,57 2,7 18 GM-AJ type of slide bush (adjustable clearance type) is also manufactured. Please contact NB for details. 1N.12kgf 3

5 GM-TYPE ouble-ide-type part structure example GM 12 UU GM type seals on both sides inner contact diameter double-wide Mo B 1 part of ball circuits GM UU GM 8 UU GM 1 UU GM 12 UU GM 13 UU GM 1 UU GM 2 UU GM UU GM 3 UU tolerance m major dimensions tolerance m B allowable static moment basic load rating 1 dynamic static mass C Co Mo N N Nm g , , , ,23 2, , 2, ,5 3, ,9 5, N.12kgf 1Nm.12kgfm

6 GMF-TYPE Round Flange ouble-ide Type GMK-TYPE Square Flange ouble-ide Type GMT-TYPE Two Side Cut ouble-ide Flange Type part structure example GM F 12 GM type UU seals on both sides flange type F round flange K square flange T two side cut flange double-wide type inner contact diameter Mo GMF- H t N1-S P.C.. f Reference plane part round flange square flange two side cut double wide double wide double wide type type flange type GMF UU GMK UU GMT UU GMF 8 UU GMK 8 UU GMT 8 UU GMF 1 UU GMK 1 UU GMT 1 UU GMF 12 UU GMK 12 UU GMT 12 UU GMF 13 UU GMK 13 UU GMT 13 UU GMF 1 UU GMK 1 UU GMT 1 UU GMF 2 UU GMK 2 UU GMT 2 UU GMF UU GMK UU GMT UU GMF 3 UU GMK 3 UU GMT 3 UU of ball circuits tolerance m tolerance m H major dimensions f t

7 K N1-S N2-S N2-S F A A allowable static moment Mo basic load rating mass g Static Co ynamic C perpendicularity flange GMT- GMF-GMK- N2-S F A N1-S K P.C.. GMT- GMK- GMF- Nm N N m , , , ,35 1, ,7 1, ,1 1, ,9 2, N.12kgf 1Nm.12kgfm GMK- GMT13 or smaller GMT- GMT1 or larger

8 3 First Edition:May 31, 22