EN 22857:1989
Current
The latest, up-to-date edition.
Ground thread taps for ISO metric threads of tolerances 4H to 8H and 4G to 6G coarse and fine pitches - Manufacturing tolerances on the threaded portion (ISO 2857:1973 + A1:1984 +A2:1986)
28-09-1989
1 Scope and field of application
2 References
3 Basic data
3.1 Thread profile of nuts
3.2 Thread profile of tap
3.3 Tolerance classes of taps
3.4 Calculation of tap thread dimensions of
classes 1,2 and 3
4 Manufacturing tolerances on tap threads
4.1 Major diameter d
4.2 Pitch diameter d[2]
4.3 Minor diameter of tap d[1]
4.4 Tolerance on the angle alpha and half angle
alpha/2 of thread
4.5 Cumulative pitch error T[p] over any number of threads
5 Designation and marking of taps
6 Example of calculation of the dimensions of the threaded
portion of a tap
Annex A - Ground thread taps for ISO metric threads of coarse pitch
Annex B - Ground thread taps for ISO metric threads of fine pitch
Is valid for the short taps specified in ISO 529 as well as for any other kind of ground thread taps with the same diameters and pitches. The internal threads produced with those taps are conventionally designated by the simplified denomination of "nut" in agreement with the word used in ISO 965 for the general designation of all internal threads.
| Committee |
CEN/BT
|
| DevelopmentNote |
Also numbered as BS 949-4(1990) and ISO 2857. (10/2005)
|
| DocumentType |
Standard
|
| PublisherName |
Comite Europeen de Normalisation
|
| Status |
Current
|
| Standards | Relationship |
| NF EN 22857 : 1990 | Identical |
| DIN EN 22857:1990-07 | Identical |
| NFE 66 100 : 1985 | Identical |
| UNI EN 22857 : 1990 | Identical |
| NBN EN 22857 : 1992 | Identical |
| UNE 16605:1991 | Identical |
| I.S. EN 22857:1990 | Identical |
| PN EN 22857 : 1999 | Identical |
| SN EN 22857 : 1990 | Identical |
| ISO 2857:1973 | Identical |
| NEN ISO 2857 : 1990 | Identical |
| NS ISO 2857 : 1ED 1989 | Identical |
| BS 949-4:1990 | Identical |
| ISO 724:1993 | ISO general-purpose metric screw threads — Basic dimensions |
| ISO 965-2:1998 | ISO general purpose metric screw threads — Tolerances — Part 2: Limits of sizes for general purpose external and internal screw threads — Medium quality |
| ISO 529:2017 | Short machine taps and hand taps |
| ISO 965-1:2013 | ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data |
| ISO 965-3:1998 | ISO general purpose metric screw threads Tolerances Part 3: Deviations for constructional screw threads |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.