GB/T 3478.3-2008Straight cylindrical involute splines - Metric module, side fit - Part 3: 37.5°pressure angle dimensions tables (English PDF)

Foreword

GB/T 3478 "cylindrical straight teeth involute spline (metric series of teeth with the side)" is divided into nine parts.

- Part 1. General;

- Part 2. 30 ° pressure angle dimension table;

- Part 3. 37.5 ° pressure angle dimension table;

- Part 4. 45 ° pressure angle dimension table;

- Part 5. Inspection;

- Part 6. 30 ° pressure angle M and W;

- Part 7. 37.5 ° Pressure angle M and W;

- Part 8. 45 ° pressure angle M and W; Part 9. Measuring rods. This part is part 3 of GB/T 3478.

This part refers to ISO 4156-2.:2005 "Cylindrical Straight Spike Spline Spline (Metric Modulus Tooth Side) Part 2. Dimensions" Capacity is GB/T 3478.3-1995 "cylindrical straight teeth involute spline 37.5 ° pressure angle size table" revision. With GB/T 3478.3-1995 compared to the main differences as follows.

--- standard name from the "cylindrical straight teeth involute spline 37.5 ° pressure angle size table" to "cylindrical straight involute spline (metric Modular tooth side mating) Part 3. 37.5 ° pressure angle dimension table ";

--- modified the original standard of the error, according to GB/T 1.1 made editorial changes.

This part of the national machinery shaft and accessories standardization technical committee put forward and centralized.

1 Scope

This part of GB/T 3478 specifies a cylindrical straightening of 37.5 ° standard pressure angle round tooth root (hereinafter referred to as 37.5 ° round root) All splines required for spline size.

This part applies to GB/T 3478.1-2008 standard in the pressure angle of 37.5 °, modulus of 0.5mm ~ 10mm, the tooth side With the involute spline.

The size of this part of the table is according to GB/T 3478.1-2008 Table 3 formula and the tooth side with H/h, and the use of basic test methods Compiled.

2 Normative reference documents

The terms of this document are the terms of this part by reference to this part of GB/T 3478. Any reference to the date of the text, All subsequent amendments (excluding corrigenda) or revisions do not apply to this part, however, encouragement under this section The parties to the agreement study whether the latest versions of these files are available. For undated references, the latest edition of this document applies section.

GB/T 1800.1 Geometrical product specifications (GPS) Limits and mating - Part 1. Basis for tolerances, deviations and mates

GB/T 3478.1-2008 Cylindrical straight teeth involute splines (metric series of teeth with side) Part 1. General (ISO 4156-1. 2005, MOD)

3 Size table

3.1 37.5 ° round tooth root, the modulus of 0.5mm ~ 10mm, the tolerance level of 4,5,6 and 7 of the spline size table, see Table 1 ~ Table 28.

3.2 The limit deviation of the inner spline diameter Di and the tolerance of the outer spline diameter Dee See GB/T 3478.1-2008.

3.3 Internal spline diameter Dei and outer spline diameter Die tolerance, from GB/T 1800.1 standard tolerances IT12, IT13 or IT14 Select.

3.4 When the inner and outer splines are machined, the radius of the tooth root is changed. This part gives the minimum radius of curvature of the tooth root arc.

GB/T 3478.1-2008 Table 26.

3.5 When the selected test method is not the basic method, its role in the maximum cogging width, the actual maximum tooth width, the minimum tooth thickness and The actual maximum tooth thickness is calculated as follows.

The maximum tooth width of the role of Evmax = Emax-lambda;

The actual tooth width is the minimum value Emin = Evmin + lambda; The minimum tooth thickness Svmin = Smin + lambda; The actual maximum tooth thickness Smax = Svmax - lambda.

3.6 When the spline tooth side with the category is not H/h, the size of the size of the spline in the size table should be calculated according to the following formula. The maximum tooth thickness Svmax = S + esv;

Actual tooth thickness minimum value Smin = Svmax- (T + lambda). Where.

Esv --- on the role of tooth thickness on the deviation, see GB/T 3478.1-2008 Table 23;

(T + lambda) --- total tolerance, see GB/T 3478.1-2008 Table 8 ~ Table 21.

See page 24 for details on the large diameter of the large splines and trails.

3.7 Size table Chinese and foreign splines involute start circle diameter maximum value DFemax value is based on the principle of the principle of tooth-type tool derivation of the formula Calculated.

When the spline tooth side with the category is not H/h, DFemax can be calculated according to the formula in Table 3 of GB/T 3478.1-2008.