The basic unit of the international system of units

With a special name, including the auxiliary unit of the international system of units

Sl derivative unit

Out of the need to protect human health and safety.

SI export unit with special name

Sl prefix

The legal units of measurement in China can be used together with the international system of units.

unit

Municipal units for reference

Chapter II Public Data and Standard Codes

Transmission ratio of various transmission devices (reference value)

Approximate efficiency of mechanical transmission and friction pair

Density of common materials

Elastic Modulus and Poisson's Ratio of Common Materials

Friction coefficient of materials

Friction coefficient of parts

coefficient of rolling friction

Average ultimate strength of steel, gray cast iron and light metal

Hardness comparison table of ferrous metal

Approximate Engler Viscosity Pair at 50℃ and 100℃

According to the table

Conversion table of kinematic viscosity and engler viscosity

Some domestic standards and specifications

Common national standard codes

Chapter III Mechanical Drawing

I. General provisions

Pattern format and format (GB/T 14689- 1993)

Drawing scale (GB/T 14690- 1993)

Second, the prescribed painting methods

Drawings of threads and threaded fasteners

(GB/T4459. 1- 1995)

Gear drive, worm drive and sprocket diagram (GB/T 4459.2- 1984)

Spline drawing and dimensioning (GB/T 4459.3- 1984)

Drawing method of spring (GB/T 4459.4- 1984)

Three. Symbols of Mechanism Motion Diagram (GB/T4460- 1984)

Movement of mechanism members

Motion pair

Components and their connections.

Multi-bar member and its components

friction drive

Gear mechanism

Gear drive and worm drive

cam mechanism

Geneva mechanism and ratchet mechanism

Coupling, brake and clutch

belt drive

chain transmission

screw drive

spring

prime motor

bearing

Four, rolling bearing representation (GB/T 4459.7- 1998)

Characteristic drawings and specified drawings of ball bearings and roller bearings

Chapter IV Materials

I. Ferrous metal materials

Names and symbols of common chemical elements in metallic materials

Common heat treatment methods and applications of steel

Chemical heat treatment method of steel and its application

Common Heat Treatment Processes and Specifications (GB/T 12603—— 1990)

Gray iron castings (GB/T9439- 1988)

Ductile Iron Castings (GB/T 1348- 1988)

Cast carbon steel parts for general engineering (GB/T11352 ——1989)

Carbon structural steel (GB/T700- 1988)

High quality carbon structural steel (GB/T699- 1988)

Commonly used low-alloy high-strength structural steel (GB/T1591-1994)

Alloy structural steel (GB/T3077- 1988)

Second, the labeling content of heat treatment of parts on the part drawing

Example of gear heat treatment

Example of sprocket heat treatment _

Example of worm heat treatment

Examples of spring heat treatment

Example of heat treatment of shaft

Third, non-ferrous metal materials

Representation of Common Nonferrous Metals and Alloy Products

Processing brass (GB/T5232- 1985)

Machining bronze (GB/T5233- 1985)

Cast copper alloy (GB/T1176-1987)

Cast aluminum alloy (GB/T1173-1995)

Casting bearing alloy (GIJ/T1174-1992)

Four, steel and profiles

Hot rolled round steel and square steel (GB/T702- 1986)

Hot rolled steel plate (GB/T709- 1988)

Hot rolled equilateral angle steel (GB/T9787- 1988)

Hot rolled unequal angle steel (GB/T9788- 1988)

Hot rolled I-beam (GB/T706- 1988)

Hot rolled channel steel (GB/T707- 1988)

Five, the structural elements of engineering plastics and their parts

1. Engineering plastics

Properties of engineering plastics

Select engineering plastics according to working conditions.

2. Structural elements of engineering plastic parts

Minimum wall thickness of plastic parts

Relationship between overall dimensions of plastic parts and optimal wall thickness

Slope of different surfaces of plastic products

Minimum aperture when the hole depth of plastic parts is less than 2 times the diameter of L.

Reinforcing rib of plastic parts

Size relationship of screw holes of plastic parts (minimum value)

Size relationship of holes in plastic parts

Chapter V General Standards

I. Standard dimensions (GB/T2822- 198 1)

Second, wrench space.

Three. Taper and cone angle series (GB/T 157- 1989)

Taper and cone angle of cone for general use

Taper and cone angle of special cone

Fourth, the central hole

Central hole (GB/T 145- 1985)

V. Grinding wheel travel groove (GB/T 6403.5- 1986)

Shape and size of grinding wheel overtravel groove on rotary surface and end surface

Overtravel groove of plane grinding wheel and V-shaped grinding wheel

Dovetail guide wheel overtravel groove

Overtravel groove of rectangular guide grinding wheel

Six, gear machining tool groove

Unloading groove of gear shaper

Unloading groove of herringbone gear

Rounding and Chamfering of Parts (GB/T 6403.4- 1986)

Forms and dimensions of rounding and chamfering

The inner and outer corners are rounded and chamfered (45. ) four assembly forms.

The relationship between Cmax and R 1 when the inner corner is chamfered and the outer corner is rounded.

Recommended values of chamfer c and rounding r corresponding to diameter d.

Eight, collar and shoulder size (reference)

Nine, the machine shaft height

Machine shaft height (GB/T12217-1990)

X. cylindrical axial extension

Cylindrical axial extension (GB/T 1569- 1990)

Chapter VI Threads and Threaded Connections

I. Thread

1. Common mainline

Basic tooth type (GB/T192-1981), diameter and pitch.

(GB/T 193~ 198 1)

Basic dimensions of common threads (GB/T196-1981)

2. Trapezoidal thread (GB/T5796- 1986)

Maximum solid tooth size of trapezoidal thread

Ladder thread diameter and pitch series

Basic dimensions of trapezoidal thread

Thread tightening length of trapezoidal thread

3. Pipe thread

55 sealing pipe thread (GB/T7306 1-2000, GB/T73062-2000)

Thread of Non-threaded Sealing Pipe (GB/T7307- 1987)

4. Metric taper thread (GB/T1415-1992)

Second, the bolt

Grade a and grade b hexagon-head bolts (GR/T5782-2000,

Hexagon head bolt length dimension

Hexagon-head bolts with full threads-Grade A and Grade B

Grade a and grade b of hexagon-head reaming bolt l (GB/T27—— 1988)

Stud16m =1.25d (GB/T898-1988)

Anchor bolt (GB/T799- 1988)

Screw-in depth and screw hole size of bolts and screws (refer to)

Third, screws

Slotted pan head screws (GB/T67-2000)

Slotted countersunk head screws (GB/T68-2000)

Cross recessed pan head screw (GB/T8 18-2000)

Cross recessed countersunk head screws (GB/T 8 19. 1-2000)

Set screws (GB/T7 1- 1985), (GB/T73- 1985), (GB/T75- 1985).

Hexagon socket head screws (GB/T 70. 1-2000)

Hexagon socket head screws (GB/T 70.2-2000)

Hexagon socket countersunk head screws (GB/T 70.3-2000)

Fourth, nuts

Hexagon nuts (GB/T6 170-2000), (GB/T 6 172. 1-2000)

1 Hexagon Slotted Nut Grade A and Grade B (GB/T6 178- 1986)

Verb (short for verb) washer

Small washer, flat washer

spring washer

Outer tongue stop washer (GB/T856- 1988)

Square inclined washer

Chapter VII Key Connection and Pin Connection

First, key connection

Section and keyway of Ping Jian connection (GB/T

1095- 1979), the form of ordinary Ping Jian.

And size (GB/T 1096- 1979).

Dimensions and tolerances of rectangular splines (GB/T1144-1987)

Length series of rectangular internal spline (GB/T10081-1988)

Second, pin

Cylindrical pin-non-quenched and tempered steel and austenitic stainless steel (GB/T

119.1-2000), pin hardened steel and martensite.

Stainless steel (GB/T 1 192-2000) and tapered pin (GB/T 1 17-2000)

Split pin (GB/T9 1-2000)

Chapter VIII Tight Solids of Shafting Parts

I. Lock the retaining ring

Lock ring with tapered pin (GB/T883- 1986), threaded lock.

Retaining ring (GB/T884- 1986)

Second, the shaft end retaining ring

Tighten the shaft end retaining ring (GB/T89 1- 1986) and the bolt.

Tighten the shaft end retaining ring (GB/T892- 1986)

Third, the elastic retaining ring

L-shaped elastic retaining ring A (GB/T893 1- 1986)

A-type shaft elastic retaining ring (GB/T 894. 1- 1986)

Four, round nut and round nut stop washer

Round nut (GB/T8 12- 1988)

Round nut stop washer (GB/T858- 1988)

Chapter 9 Rolling Bearing

I. Common Rolling Bearings

Deep groove ball bearing (GB/T276- 1994)

Self-aligning ball bearing (GB/T28 1- 1994)

Cylindrical roller bearing (GB/T283- 1994)

Self-aligning roller bearing (GB/T288- 1994)

Angular contact ball bearing (GB/T292- 1994)

Tapered roller bearing (GB/T297- 1994)

Double row tapered roller bearing (GB/T299- 1994)

Thrust ball bearing (GB/T30 1- 1995)

Second, the rolling bearing seat

SN2 and SN3 Rolling Bearings (GB/T78 13- 1987)

SN5 and SN6 Rolling Bearings (GB/T78 13- 1987)

Three. Bearing sealing felt ring oil seal

Lip shape with rotating shaft of inner skeleton and outer skeleton

Sealing ring (GB/T13871-1992)

Assembled rotary shaft lip seal ring (GB/T13871-1992)

Four. Matching of Rolling Bearing with Shaft and Shell (GB/T275- 1993)

Radial equivalent dynamic load classification

Install the shaft tolerance zone of the radial bearing.

Install the tolerance zone for the bore of the radial bearing housing.

Install the shaft tolerance zone of the thrust bearing.

Install the tolerance zone for the bore of the thrust bearing housing.

Form and Position Tolerance of Shaft and Housing Hole

Surface roughness of mating surface

Chapter 10 Sliding bearing seat

Integral lining positive sliding bearing seat (JB/T2560- 199 1)

Split stud bolt forward sliding bearing seat (JB/T 2561-1991)

Split four-column positive sliding bearing seat (JB/T2562- 199 1)

Split four-column inclined sliding bearing seat (JB/T2563- 199 1)

Chapter 1 1 Lubricants and lubrication methods

I. Lubricating oil

Main properties and uses of common lubricating oil

Second, grease

Main properties and uses of common lubricating grease

Third, the lubrication method

Common lubrication methods

Chapter 12 Coupling and Clutch

I. Form and size of shaft hole and keyway of coupling

Shapes, codes and series dimensions of shaft holes and keyways (GB/T3852- 1997)

Cooperation between shaft hole and shaft extension

Second, rigid coupling.

Flanged coupling (GB/T5843- 1986)

Third, elastic coupling

1. Flexible coupling with nonmetallic elastic elements

Elastic pin coupling (GB/T50 14- 1985)

Elastic sleeve pin coupling (GB/T4323- 1984)

Elastic pin-tooth coupling (GR/T50 15—— 1985)

Coupling with elastic spider (GB/T5272—— 1985)

Tire coupling (GB/T5844- 1986)

2. Flexible coupling with metal elastic elements

Diaphragm coupling (JB/T9 147- 1999)

3. Flexible coupling without elastic elements

Roller chain coupling (GB/T6069- 1985)

GICL type drum gear coupling (JB/T 8854.2 —— 1999)

GllVL drum gear coupling (JB/T 8854.2 —— 1999)

Four. Toothed clutch

Rectangular claw clutch for simple transmission

Rectangular and trapezoidal claw clutches

Chapter XIII Restrictions and Cooperation

I. Vocabulary (GB/T1800.1-1997)

Terms and definitions

Second, the basic provisions of tolerance, deviation and cooperation (GB/T 1800.2- 1998)

1. code

show

3. Cooperate with classification

Three. Standard tolerance and basic deviation (GB/T 1800.3 —— 1998)

1. standard tolerance

Standard tolerance value

2. Basic deviation

Basic deviation value of axis

Basic deviation value of hole

3. Calculation example

General tolerance and unmarked tolerance of linear dimensions (GB/T 1804- 1992)

1. Overview

2. The concept of general tolerance of linear dimension

3. General tolerance of linear dimensions

Limit deviation value of linear dimension

Limit deviation between fillet radius and chamfer height.

4. General tolerance representation of linear dimensions

Chapter IV Shape and Position Tolerances (hereinafter referred to as Form and Position Tolerances) (GB/T/KOOC-0/82-/KOOC-0/996, GB/T/KOOC-0/84-/KOOC-0/996).

I. Symbol of form and position tolerance

Contents contained in form and position tolerance symbols

Symbol and datum requirements of each characteristic item of form and position tolerance

Other related symbols of form and position tolerance

Symbol with additional requirements for the shape of the measured element.

Rules for drawing symbols of form and position tolerance

Recommended size of symbols used in type A fonts

Second, the form and position tolerance marking method

Marking method and description of measuring elements

Labeling method and description of datum elements

Marking method and explanation of tolerance values and related symbols

Three. Definition, example and description of shape and position tolerance zone

Four, the tolerance value stipulated by the national standard

1. Provisions on marking tolerance values on drawings

Straightness and flatness

Roundness and cylindricity

Parallelism, verticality and inclination

Coaxiality, symmetry, circular runout and total runout

Rank system

2. Provisions that tolerance values are not displayed on drawings

Unmarked tolerance values for straightness, flatness, verticality, symmetry and circular runout.

Selection of Form and Position Tolerance of verb (abbreviation of verb) (Reference)

1. Selection of form and position tolerance grade

Examples of selecting tolerance levels for straightness and flatness.

Surface roughness corresponding to tolerance levels of straightness and flatness.

Chapter 15 Surface roughness

Chapter 16 Tolerances of cylindrical gear drive, bevel gear drive, worm drive and precision roller chain sprocket for short pitch drive

Chapter 17 Motor and Normal Track