{"id":459920,"date":"2024-10-20T10:06:43","date_gmt":"2024-10-20T10:06:43","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-6621-42024\/"},"modified":"2024-10-26T18:40:49","modified_gmt":"2024-10-26T18:40:49","slug":"bs-iso-6621-42024","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-6621-42024\/","title":{"rendered":"BS ISO 6621-4:2024"},"content":{"rendered":"

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
7<\/td>\nForeword <\/td>\n<\/tr>\n
8<\/td>\nIntroduction <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references
3 Terms and definitions
4 Piston ring codes <\/td>\n<\/tr>\n
12<\/td>\n5 Designation of piston rings
5.1 Designation elements and order
5.1.1 General
5.1.2 Mandatory elements <\/td>\n<\/tr>\n
13<\/td>\n5.1.3 Measurement principles
5.1.4 Additional elements
5.1.5 Elements for additional marking
5.2 Designation examples
5.2.1 Designation example of a piston ring in accordance with ISO 6622-1
5.2.2 Designation example of a piston ring in accordance with ISO 6624-1 <\/td>\n<\/tr>\n
14<\/td>\n5.2.3 Designation example of a piston ring in accordance with ISO 6626-1
6 Designation of piston rings
6.1 General
6.2 Mandatory topside identification marking <\/td>\n<\/tr>\n
15<\/td>\n6.3 Additional marking
7 General characteristics
7.1 Ring shape <\/td>\n<\/tr>\n
16<\/td>\n7.2 Light tightness
7.3 Closed gap
7.4 Tangential force, Ft, and diametral force, Fd, of single piece piston rings
7.4.1 Calculation of Ft, and Fd values in dimension tables of dimensional standards <\/td>\n<\/tr>\n
17<\/td>\n7.4.2 Correction of Ft, and Fd values <\/td>\n<\/tr>\n
18<\/td>\n7.4.3 Examples for correction of Ft and Fd <\/td>\n<\/tr>\n
20<\/td>\n7.5 Tangential force Ft of multipiece oil control rings as specified in ISO 6626-1, ISO 6626-2, and ISO 6626-3
7.5.1 General
7.5.2 Rounding of values
7.5.3 Examples for calculating tangential force Ft <\/td>\n<\/tr>\n
21<\/td>\n7.6 Tangential force Ft of expander\/rail oil control rings as specified in ISO 6627
7.6.1 General
7.6.2 Example for calculating the tangential force Ft \u2014 Selected type of piston ring: ISO 6627 \u2013ES3 \u2013 85 \u00d7 3 \u2013 MC67 MC68\/CR1 PNH
8 Notches for preventing ring rotation
8.1 Ring joint with internal notch (only for compression rings as specified in ISO 6622 and ISO 6624) <\/td>\n<\/tr>\n
23<\/td>\n8.2 Ring joint with side notch (only for compression rings as specified in ISO 6622) <\/td>\n<\/tr>\n
24<\/td>\n9 Machining of surfaces
9.1 Peripheral surfaces
9.2 Side faces
9.3 Other surfaces <\/td>\n<\/tr>\n
25<\/td>\n10 Plated, coated, and treated surfaces
10.1 Chromium plating on peripheral and side surfaces
10.1.1 General
10.1.2 Chromium plating thickness
10.1.3 Chromium plated rings of fully faced design
10.1.4 Chromium plated rings of semi-inlaid design <\/td>\n<\/tr>\n
26<\/td>\n10.1.5 Chromium plated rings of inlaid design <\/td>\n<\/tr>\n
27<\/td>\n10.1.6 Side Chromium plated rings design
10.1.7 Radius, chamfer and dimensions of peripheral edges of chromium plated rings <\/td>\n<\/tr>\n
28<\/td>\n10.1.8 Peripheral edges at the gap of chromium plated rings and rails <\/td>\n<\/tr>\n
29<\/td>\n10.1.9 Hardness of chromium plating
10.2 Spray-coated peripheral surfaces
10.2.1 Codes
10.2.2 Spray-coating thickness
10.2.3 Spray-coated rings of fully faced design
10.2.4 Spray-coated rings of semi-inlaid design <\/td>\n<\/tr>\n
30<\/td>\n10.2.5 Spray-coated rings of inlaid design <\/td>\n<\/tr>\n
31<\/td>\n10.2.6 Radius, chamfer of peripheral edges of spray-coated rings
10.2.7 Peripheral edges at gap of spray-coated rings <\/td>\n<\/tr>\n
32<\/td>\n10.2.8 Hardness of spray-coating
10.3 Nitride surfaces
10.3.1 Codes
10.3.2 Nitride case depth <\/td>\n<\/tr>\n
33<\/td>\n10.3.3 Radius and dimensions of outside and inside edges of nitride steel rings
10.3.4 Peripheral edges at the gap of nitride steel rings and rails <\/td>\n<\/tr>\n
34<\/td>\n10.4 Treated surfaces
10.4.1 Ferro-oxidized all over \u2014 Code FE \u2014 Coating thickness (0,001 to 0,005) mm
10.4.2 Phosphated all over \u2014 Code PO \u2014 Coating thickness 0,002 mm min.
10.4.3 Phosphated all over \u2014 Code PR \u2014 Coating thickness 0,002 mm max.
10.5 Physical vapour deposition coating (PVD)
10.5.1 Codes
10.5.2 PVD coating
10.5.3 PVD coating thickness
10.5.4 Hardness of PVD coating <\/td>\n<\/tr>\n
35<\/td>\n10.5.5 Peripheral edges at the gap of PVD-coated rings and rails
11 Miscellaneous
11.1 Cleanliness
11.2 Corrosion protection
11.3 Packaging
12 Traceability (optional) <\/td>\n<\/tr>\n
36<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Internal combustion engines. Piston rings – General specifications<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2024<\/td>\n38<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":459930,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[754,2641],"product_tag":[],"class_list":{"0":"post-459920","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-43-060-10","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/459920","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/459930"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=459920"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=459920"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=459920"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}