定价： 865元 / 折扣价： 736 元

定价： 637元 / 折扣价： 542 元

1. Scope This International Standard specifies the essential interface dimensions and the operating requirements for hydraulic couplers employed to transmit hydraulic power from agricultural tractors to agricultural machinery. It applies to couplers us

定价： 319元 / 折扣价： 272 元

1. Scope This International Standard specifies the information to be obtained from the instruments on the instrument panel by the operator in his normal position. It also specifies the arrangement and colour distinction of this instrumentation in order

定价： 319元 / 折扣价： 272 元

1. Scope This part of ISO 6405 establishes the common symbols for use on operator controls and other displays on earth-moving machinery as defined in ISO 6165. These symbols may be used on other types of self-propelled work machines designed to oper

定价： 819元 / 折扣价： 697 元

定价： 1183元 / 折扣价： 1006 元

1. Scope This part of ISO 4254 provides guidelines regarding the prevention of accidents arising from the use of tractors and indicates appropriate parameters to be met when designing tractors. It also specifies technical means of improving the degre

定价： 319元 / 折扣价： 272 元

1. Scope This part of ISO 4254 specifies safety requirements for winches used on forestry machinery and agricultural machinery used in forestry. It applies only to skidding winches mounted on mobile forestry machinery, e.g. skidders and forwarders a

定价： 319元 / 折扣价： 272 元

This specification deals with the standard requirements for premium quality alloy steel semifinished rolled or forged blooms and billets for reforging into aircraft and aerospace critical parts such as landing-gear forgings. Covered here are three basic classifications of steel, namely: Class I, steel manufactured by vacuum-induction melting or consumable-electrode vacuum melting process; Class II, air-melted steel manufactured by electric-furnace vacuum degassing process; Class III, air-melted steel manufactured by electric-furnace ladle refining and vacuum degassing processes. Steel materials shall be heat-treated and hot-worked by either hot rolling or forging. Alloy steels shall be examined by heat and product analyses and hardenability tests, and shall conform to chemical composition and maximum annealed Brinell hardness requirements. Quality evaluation tests, such as macrotech, microcleanliness, and nondestructive ultrasonic (both immersion and contact examination) inspection, shall be performed as well.1.1 This specification2 covers two kinds of rolls used in machinery for producing corrugated paperboard. Rolls are fabricated of forged bodies and trunnions. The trunnions may be bolted or shrink assembled on one or both ends of the body. A seal weld may be made at the body/trunnion interface. Roll shells are made of carbon/manganese, or low alloy steel as hereinafter described, and are heat treated prior to assembly. Pressure rolls may be ordered surface hardened as Condition H, or without surface hardening as Condition S. Provision is made in Supplementary Requirements S1 and S3 for the optional surface hardening of corrugating rolls.1.2 Corrugating and pressure rolls made to this specification shall not exceed 30 in. [760 mm] in inside diameter. The wall thickness of the roll body shall not be less than 1/12 of the inside diameter or 1 in. [25 mm], whichever is greater, but shall not exceed 4 in. [100 mm]. The wall thickness of the corrugating roll is measured at the bottom of the corrugations in the location of the trunnion fit. The maximum design temperature (MDT) of the roll is 600 °F [315 °C] and the maximum allowable working pressure (MAWP) is 250 psi [1.7 MPa]. The minimum design temperature shall be 40 °F [4 °C] for roll wall thicknesses up to 3 in. [75 mm]. For roll wall thicknesses over 3 in. [75 mm] to 4 in. [100 mm], the minimum design temperature shall be 120 °F [50 °C]. The maximum stresses on the roll bodies from the combined internal and external loading are limited to 18 750 psi [129 MPa] for the Class 2 pressure roll bodies, and 20 000 psi [138 MPa] for Class 1A, 1B, or 5 pressure or corrugating roll bodies in Grades 1 or 2. For the trunnions, the maximum stresses from the combined internal and external loading are limited to 15 000 psi [103.4 MPa] for Classes 3 or 4, or 20 000 psi [138 MPa] for Classes 1A, 1B, or 5 in Grade 2 only. The Grade 1 strength level is not permissible for trunnions.1.3 Referring to Table 1, material to Classes 1A, 1B, or 5 shall be used for the manufacture of corrugating or pressure roll shells, and Class 2 shall be used only for pressure roll shells. Trunnions shall be made from forgings in Classes 1A, 1B, or 5 in Grade 2 strength level as restricted by Footnote B in Table 2 or in forgings in either Class 3 or 4.1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.1.5 Unless the order specifies the applicable “M” specification designation, the material shall be furnished to the inch-pound units.1.6 Except as specifically required in this standard, all of the provisions of Specification A788/A788M apply.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

1. Scope This part of ISO 6405 establishes symbols uniquely for use on operator controls and other displays on earth-moving machinery as defined in ISO 6165. Symbols given in this part of ISO 6405 apply to controls and displays specific to backhoe l

定价： 865元 / 折扣价： 736 元

1. Scope 1.1 This Standard applies to design and performance criteria of operator controls located at the normal operating position. 1.2 This Standard provides guidelines for operator controls as relating to uniformity of location and direction of

定价： 319元 / 折扣价： 272 元

1. Scope 1.1 This Standard applies to design and performance criteria of operator controls located at the normal operating position. 1.2 This Standard provides guidelines for operator controls as relating to actuating forces. 1.3 Nonagricultura

定价： 319元 / 折扣价： 272 元

1. Scope 1.1 This Standard applies where hand controls are colour-coded. It is intended that manufacturers have the option of whether or not to colour code hand controls. 1.2 This Standard concerns colour-coding hand controls on agricultural equip

定价： 319元 / 折扣价： 272 元

1. Scope This International Standard defines zones of comfort and reach for controls derived from the overlapping reach capability of large and small operators in the seated position. 2. Field of Application This document is intended as a guide fo

定价： 319元 / 折扣价： 272 元

1. Scope This International Standard establishes the minimum performance requirements for seat belts and the fastening elements of seat belts necessary to restrain an operator or rider within a roll- over protective structure (ROPS) in the event of a m

定价： 319元 / 折扣价： 272 元