ASME B18.10:2006 pdf download

ASME B18.10:2006 pdf download.Track Bolts and Nuts
1 INTRODUCTION
1.1 Scope This Standardcovers the complete generaland dimen- sional data for inch series oval neck and elliptic neck track bolts and square nuts intended for use with these bolts, and recognized as an American National Standard. Sizes in use, but not recommended for new design, are included in the appendices of this Standard. 1.2 Comparison to ISO Standards There is no ISO standard for these products at this time. 1.3 Dimensions The inclusion of dimensional data in this Standard is not intended to imply that all of the products described herein are stock production sizes. Purchasers should consult with suppliers concerning lists of stock produc- tion sizes. All dimensions in this Standard are in inches, unless otherwise stated, and apply to unplated or uncoated products. When plating or coating is specified, the fin- ished product dimensions shall be as agreed upon between supplier and purchaser. Definitions of specified geometric characteristics are in accordance with ASME Y14.5M. 1.4 Options Options, where specified, shall be at the discretion of the manufacturer unless otherwise agreed upon by the manufacturer and the purchaser. 1.5 Terminology All terms used in this Standard are defined in ASME B18.12.
2 GENERAL DATA
2.1 Heads The design and dimensions of the heads have been commonly referred to as the mushroom head.2.2 Necks Types of track bolts are designated as “oval neck” and “elliptic neck.” 2.3 Body Diameters This Standard provides for two styles of body diame- ters. Bolts shall be provided with a full size body in accordance with the respective table dimensions ofTable 1 or 2 for body diameter, E, unless a reduced body diameter is specified on the purchase order. These shall have a body diameter not less than the minimum pitch diameter of the thread and not exceeding the minimum body diameter, E, shown in Table 1 or 2. 2.4 Bolt Length The boltlength shall be the distance measured parallel to the axis of the product from the bearing surface of the head to the extreme end of the bolt, including the point if the product is pointed. 2.5 Threads Bolt threads shall be rolled unless otherwise agreed to between the purchaser and the supplier. Threads shall be Unified InchSeries, Class 2Aas speci- fied in respective dimensional tables in ASME B1.1. 2.5.1 Thread Acceptance Gaging. Unless otherwise specified, dimensional acceptability of screw threads shall be determined based on System 21, ASME B1.3M. 2.6 Thread Length The length of thread shall be measured parallel to the axis of the bolt from the end of the bolt to the last complete (fully formed) thread. The minimum thread length, L T , shall be as shown in Tables 1 and 2. The tolerance on thread length shall be + 0.187 in. or 2.5 ✕ pitch, whichever is greater. Bolts of nominal lengths too shortto accommodate the minimum thread lengths shall be threaded full length. The distance from the neck to the first complete (full form) thread shall not exceed 2 1 ⁄ 2 threads for sizes up to and including1 in. and 3 1 ⁄ 2 threads for sizes over 1 in. 2.7 Pointed Products Unless otherwise specified, bolts need not be pointed. When pointed, the first full formed thread at a major diameter is located at a distance no greater than 2 times the pitch measured from the end of the screw. 2.9 Track Bolt Nuts Track bolt nuts shall be dimensionally in accordance with ASME B18.2.2. Selected sizes are included in Table 3. 2.10 Finish Unless otherwise specified, bolts and nuts shall be supplied with a plain (as processed) finish, unplated or uncoated. 2.11 Workmanship Bolts and nuts shall be visually, without magnifica- tion, free from burrs, seams, laps, loose scales, irregular surfaces, and any defects affecting their serviceability. When control of surface discontinuities for bolts is required, the purchaser shall specify conformance to ASTM F 788/F 788M. When control of surface discontinuities for nuts is required, the purchaser shall specify conformance to ASTM F 812/F 812M.