GB/T 22776-2008 English PDF

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GB/T 22776-2008: Tolerances and fits for timekeeping instruments -- Tolerances of plastic parts
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22776-2008	279	Add to Cart	3 days	Tolerances and fits for timekeeping instruments -- Tolerances of plastic parts	Valid

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Basic data

Standard ID: GB/T 22776-2008 (GB/T22776-2008)
Description (Translated English): Tolerances and fits for timekeeping instruments -- Tolerances of plastic parts
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y11
Classification of International Standard: 39.040.01
Word Count Estimation: 12,191
Date of Issue: 2008-12-30
Date of Implementation: 2009-09-01
Regulation (derived from): National Standard Approval Announcement 2008 No.24 (Total No.137)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the timing equipment with plastic parts tolerances. This standard applies to the basic dimensions up to 500 mm smooth barrel with plastic parts and non- fit size.

GB/T 22776-2008: Tolerances and fits for timekeeping instruments -- Tolerances of plastic parts

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Tolerances and fits for timekeeping instruments. Tolerances of plastic parts ICS 39.040.01 Y11 National Standards of People's Republic of China Timing devices with tolerance and cooperation Plastic Tolerances Posted 2008-12-30 2009-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is in the original light industry standard QB/T 1989-1994 "timing devices with tolerance and fit plastic parts tolerance" basis Making. Appendix A of this standard is an informative annex. The standard proposed by China National Light Industry Council. This standard by the National Standardization Technical Committee of the watch. This standard was drafted. Shandong Compas Watch Co., Ltd., Fujian on the Run Precision Instrument Co., Ltd., Wuhan-Shing Electronics Co., Institute of Light Industry watch. Drafters of this standard. according to Tian Ke, Su Fang, Sun Gang, Yu Wen Bo, Ye Min, Kim Young-sook. From the date of implementation of this standard, the original light industry standard QB/T 1989-1994 "timing devices with tolerance and fit plastic parts tolerance" Automatically expires. Timing devices with tolerance and cooperation Plastic Tolerances

1 Scope

This standard specifies the timing devices with plastic parts tolerance. This standard applies to the basic dimensions of 500mm smooth cylindrical plastic parts cooperation and non-cooperation dimensions.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 1801 limits and tolerances and mating with the choice (GB/T 1801-1999, eqv ISO 1829. 1975) GB/T 1803 limits and with the size up to 18mm holes, shaft tolerance

3 Basic provisions

Hole 3.1 standard, the shaft tolerance zone are shown in Table 1 and Table 2. 3.2 In some special cases, in order to ensure tolerance of plastic parts, Tables 1 and 2, there is no tolerance specified may also be used GB/T 1801 and GB/T 1803 other tolerance zone. Limit deviation value 3.3 standard axis of the hole tolerance zone are shown in Table 3 and Table 4, none of which can be obtained from GB/T 1801 and GB/T 1803 in the search takes. 3.4 axis adopted yardsticks recommended hole tolerance zone formed with Appendix A.

4 Conditions

Plastic parts by molding after placing a certain time at room temperature environment, generally not less than 16h, in order to eliminate due process caused stress. Inspection should be ± 2 ℃ temperature of 20 ℃, relative humidity of 65% ± 5% of the conditions. Deviation from this condition should make the appropriate amendments. ......

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