{"id":59,"date":"2026-09-04T07:30:00","date_gmt":"2026-09-04T05:30:00","guid":{"rendered":"https:\/\/www.matai.cz\/blog\/?p=59"},"modified":"2026-08-31T17:19:58","modified_gmt":"2026-08-31T15:19:58","slug":"din-84-963-965-srouby-s-drazkou","status":"publish","type":"post","link":"https:\/\/www.matai.cz\/blog\/din-84-963-965-srouby-s-drazkou\/","title":{"rendered":"\u0160rouby s dr\u00e1\u017ekou DIN 84\/963\/965: v\u00e1lcov\u00e1, z\u00e1pustn\u00e1 a \u010do\u010dkov\u00e1 hlava"},"content":{"rendered":"

Trojice norem DIN 84<\/strong>, DIN 963<\/strong> a DIN 965<\/strong> pat\u0159\u00ed mezi nej\u010dast\u011bji popt\u00e1van\u00e9 metrick\u00e9 \u0161rouby do stroj\u00edrenstv\u00ed, elektrotechniky i jemn\u00e9 mechaniky. Jde o tzv. \u0161rouby do kovu (machine screws) s metrick\u00fdm z\u00e1vitem, ur\u010den\u00e9 k za\u0161roubov\u00e1n\u00ed do p\u0159edem p\u0159ipraven\u00e9 matice nebo z\u00e1vitov\u00e9 d\u00edry. V\u0161echny t\u0159i se na trhu ozna\u010duj\u00ed jako „\u0161rouby s dr\u00e1\u017ekou“, ve skute\u010dnosti se ale li\u0161\u00ed jak tvarem hlavy, tak typem pohonu. V tomto v\u00fdkladu si ujasn\u00edme, co kter\u00e1 norma p\u0159esn\u011b specifikuje, jak\u00e9 jsou jejich ISO a \u010cSN ekvivalenty a podle \u010deho mezi nimi v praxi volit.<\/p>\n

D\u016fle\u017eit\u00e9 upozorn\u011bn\u00ed: dr\u00e1\u017eka p\u0159\u00edm\u00e1 vs. k\u0159\u00ed\u017eov\u00e1<\/h2>\n

Hned na \u00favod je t\u0159eba uv\u00e9st na pravou m\u00edru roz\u0161\u00ed\u0159en\u00fd zjednodu\u0161uj\u00edc\u00ed n\u00e1zev. DIN 84<\/strong> a DIN 963<\/strong> maj\u00ed skute\u010dn\u011b p\u0159\u00edmou (rovnou) dr\u00e1\u017eku<\/em> pro ploch\u00fd \u0161roubov\u00e1k. DIN 965<\/strong> m\u00e1 naproti tomu k\u0159\u00ed\u017eovou dr\u00e1\u017eku<\/em> – pohon Phillips (typ H) nebo Pozidriv (typ Z), nikoli p\u0159\u00edmou dr\u00e1\u017eku. Souhrnn\u00e9 ozna\u010den\u00ed „\u0161rouby s dr\u00e1\u017ekou“ je tedy u DIN 965 nep\u0159esn\u00e9: jedn\u00e1 se o k\u0159\u00ed\u017eov\u00fd pohon. Tento rozd\u00edl je p\u0159i objedn\u00e1v\u00e1n\u00ed z\u00e1sadn\u00ed, proto\u017ee ovliv\u0148uje volbu n\u00e1\u0159ad\u00ed (bit) i kvalitu p\u0159enosu krout\u00edc\u00edho momentu.<\/p>\n

DIN 84 – v\u00e1lcov\u00e1 hlava s p\u0159\u00edmou dr\u00e1\u017ekou<\/h2>\n

Norma DIN 84<\/strong> popisuje \u0161roub s v\u00e1lcovou hlavou<\/strong> (anglicky cheese head) a p\u0159\u00edmou dr\u00e1\u017ekou. Hlava m\u00e1 rovn\u00fd horn\u00ed povrch a v\u00e1lcov\u00fd pl\u00e1\u0161\u0165, p\u0159esahuje nad spojovan\u00fd povrch a poskytuje velkou dosedac\u00ed plochu. ISO ekvivalentem je ISO 1207<\/strong>, v \u010desk\u00fdch norm\u00e1ch odpov\u00edd\u00e1 \u010cSN 02 1131<\/strong>. \u0160rouby DIN 84 se hod\u00ed tam, kde hlava nesm\u00ed b\u00fdt zapu\u0161t\u011bn\u00e1, ale m\u00e1 m\u00edt \u010dist\u00fd, technicky stroh\u00fd vzhled – typicky p\u0159\u00edstrojov\u00e1 a strojn\u00ed technika, kryty, li\u0161ty a podobn\u011b.<\/p>\n

Orienta\u010dn\u00ed rozm\u011bry vybran\u00fdch velikost\u00ed (dle podklad\u016f ISO 1207 \/ DIN 84):<\/p>\n\n\n\n\n\n\n\n\n\n\n
Z\u00e1vit<\/th>\nPrůměr hlavy dk<\/sub> (mm)<\/th>\nVýška hlavy k (mm)<\/th>\nŠířka drážky n (mm)<\/th>\nHloubka drážky t (mm)<\/th>\n<\/tr>\n<\/thead>\n
M3<\/td>\n5,5<\/td>\n2,0<\/td>\n0,8<\/td>\n0,85<\/td>\n<\/tr>\n
M4<\/td>\n7,0<\/td>\n2,6<\/td>\n1,2<\/td>\n1,1<\/td>\n<\/tr>\n
M5<\/td>\n8,5<\/td>\n3,3<\/td>\n1,2<\/td>\n1,3<\/td>\n<\/tr>\n
M6<\/td>\n10,0<\/td>\n3,9<\/td>\n1,6<\/td>\n1,6<\/td>\n<\/tr>\n
M8<\/td>\n13,0<\/td>\n5,0<\/td>\n2,0<\/td>\n2,0<\/td>\n<\/tr>\n
M10<\/td>\n16,0<\/td>\n6,0<\/td>\n2,5<\/td>\n2,4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Hodnoty berte jako orienta\u010dn\u00ed – pro v\u00fdrobn\u00ed v\u00fdkresy v\u017edy vych\u00e1zejte z platn\u00e9ho zn\u011bn\u00ed normy. Pokud \u0159e\u0161\u00edte volbu mezi p\u0159\u00edmou dr\u00e1\u017ekou a vnit\u0159n\u00edm \u0161estihranem, srovn\u00e1n\u00ed pohon\u016f najdete v \u010dl\u00e1nku jak vybrat spojovac\u00ed materi\u00e1l<\/a>.<\/p>\n

DIN 963 – z\u00e1pustn\u00e1 hlava s p\u0159\u00edmou dr\u00e1\u017ekou<\/h2>\n

Norma DIN 963<\/strong> definuje \u0161roub se z\u00e1pustnou (ku\u017eelovou) hlavou<\/strong> a p\u0159\u00edmou dr\u00e1\u017ekou. Dosedac\u00ed plocha hlavy je ku\u017eelov\u00e1 s vrcholov\u00fdm \u00fahlem 90°<\/strong>, tak\u017ee po dota\u017een\u00ed hlava l\u00edcuje s povrchem nebo z\u016fst\u00e1v\u00e1 m\u00edrn\u011b pod n\u00edm. ISO ekvivalentem je ISO 2009<\/strong>, v \u010cSN 02 1151<\/strong>. Tento typ se pou\u017e\u00edv\u00e1 v\u0161ude tam, kde hlava nesm\u00ed p\u0159esahovat – pohledov\u00e9 d\u00edlce, vodic\u00ed plochy, m\u00edsta s rizikem zachycen\u00ed nebo po\u017eadavkem na hladk\u00fd povrch.<\/p>\n

Orienta\u010dn\u00ed rozm\u011bry (dle podklad\u016f ISO 2009 \/ DIN 963, \u00fahel hlavy 90°):<\/p>\n\n\n\n\n\n\n\n\n\n\n
Z\u00e1vit<\/th>\nPrůměr hlavy dk<\/sub> max (mm)<\/th>\nVýška hlavy k (mm)<\/th>\nŠířka drážky n (mm)<\/th>\nHloubka drážky t min (mm)<\/th>\n<\/tr>\n<\/thead>\n
M3<\/td>\n5,6<\/td>\n1,65<\/td>\n0,8<\/td>\n0,6<\/td>\n<\/tr>\n
M4<\/td>\n7,5<\/td>\n2,2<\/td>\n1,0<\/td>\n0,8<\/td>\n<\/tr>\n
M5<\/td>\n9,2<\/td>\n2,5<\/td>\n1,2<\/td>\n1,0<\/td>\n<\/tr>\n
M6<\/td>\n11,0<\/td>\n3,0<\/td>\n1,6<\/td>\n1,2<\/td>\n<\/tr>\n
M8<\/td>\n14,5<\/td>\n4,0<\/td>\n2,0<\/td>\n1,6<\/td>\n<\/tr>\n
M10<\/td>\n18,0<\/td>\n5,0<\/td>\n2,5<\/td>\n2,0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Pro zapu\u0161t\u011bn\u00ed hlavy je nutn\u00e9 srazit (zahloubit) otvor ku\u017eelov\u00fdm z\u00e1hlubn\u00edkem 90°, aby ku\u017eelov\u00e1 plocha hlavy dosedla po cel\u00e9 plo\u0161e a nedoch\u00e1zelo k vyboulen\u00ed materi\u00e1lu kolem otvoru.<\/p>\n

DIN 965 – z\u00e1pustn\u00e1 hlava s k\u0159\u00ed\u017eovou dr\u00e1\u017ekou<\/h2>\n

Norma DIN 965<\/strong> popisuje \u0161roub se z\u00e1pustnou hlavou<\/strong> (\u00fahel 90°, stejn\u00e1 geometrie jako DIN 963), ale s k\u0159\u00ed\u017eovou dr\u00e1\u017ekou<\/strong> – ve variant\u011b Phillips (typ H) nebo Pozidriv (typ Z). ISO ekvivalentem je ISO 7046<\/strong>, v \u010cSN 02 1152<\/strong>. K\u0159\u00ed\u017eov\u00fd pohon umo\u017e\u0148uje rychlej\u0161\u00ed a centrovan\u011bj\u0161\u00ed nasazen\u00ed bitu, je vhodn\u011bj\u0161\u00ed pro strojn\u00ed a akumul\u00e1torov\u00e9 \u0161roubov\u00e1n\u00ed a obecn\u011b se s n\u00edm l\u00e9pe pracuje p\u0159i s\u00e9riov\u00e9 mont\u00e1\u017ei ne\u017e s p\u0159\u00edmou dr\u00e1\u017ekou.<\/p>\n

Geometrie hlavy DIN 965 odpov\u00edd\u00e1 DIN 963 (stejn\u00fd pr\u016fm\u011br i \u00fahel zapu\u0161t\u011bn\u00ed), li\u0161\u00ed se tedy fakticky jen pohonem – p\u0159\u00edm\u00e1 dr\u00e1\u017eka (DIN 963) vs. k\u0159\u00ed\u017eov\u00e1 dr\u00e1\u017eka (DIN 965). P\u0159i objedn\u00e1vce DIN 965 je vhodn\u00e9 up\u0159esnit, zda po\u017eadujete H (Phillips)<\/strong>, nebo Z (Pozidriv)<\/strong>, proto\u017ee tomu mus\u00ed odpov\u00eddat i pou\u017eit\u00fd bit.<\/p>\n

Pozor na pojem „\u010do\u010dkov\u00e1 hlava“<\/h2>\n

V titulku zm\u00edn\u011bn\u00e1 \u010do\u010dkov\u00e1 (zv\u00fd\u0161en\u00e1 z\u00e1pustn\u00e1) hlava<\/strong> ve skute\u010dnosti nen\u00ed p\u0159edm\u011btem norem DIN 84\/963\/965. \u010co\u010dkovou hlavu – tj. z\u00e1pustnou hlavu s vypoukl\u00fdm (zaoblen\u00fdm) vr\u0161kem – specifikuj\u00ed normy DIN 964<\/strong> (p\u0159\u00edm\u00e1 dr\u00e1\u017eka) a DIN 966<\/strong> (k\u0159\u00ed\u017eov\u00e1 dr\u00e1\u017eka). Mapov\u00e1n\u00ed hlav je tedy n\u00e1sleduj\u00edc\u00ed: DIN 84 = v\u00e1lcov\u00e1 hlava, DIN 963 a DIN 965 = ploch\u00e1 z\u00e1pustn\u00e1 hlava, DIN 964 a DIN 966 = \u010do\u010dkov\u00e1 (zv\u00fd\u0161en\u00e1 z\u00e1pustn\u00e1) hlava. Tuto distinkci uv\u00e1d\u00edme proto, aby nedo\u0161lo k z\u00e1m\u011bn\u011b p\u0159i v\u00fdb\u011bru.<\/p>\n

Materi\u00e1ly a t\u0159\u00eddy: nerez A2 a A4<\/h2>\n

Tyto \u0161rouby dod\u00e1v\u00e1me nej\u010dast\u011bji v nerezov\u00e9m proveden\u00ed A2 (1.4301)<\/strong> a A4 (1.4401\/1.4404)<\/strong>. A2 je standardn\u00ed volba do b\u011b\u017en\u00e9ho vnit\u0159n\u00edho i m\u00edrn\u011b exponovan\u00e9ho prost\u0159ed\u00ed, A4 s obsahem molybdenu je ur\u010dena do prost\u0159ed\u00ed s vy\u0161\u0161\u00ed korozn\u00ed z\u00e1t\u011b\u017e\u00ed (vlhko, chlor, p\u0159\u00edmo\u0159sk\u00e9 a chemick\u00e9 provozy). Volb\u011b mezi ob\u011bma t\u0159\u00eddami se podrobn\u011b v\u011bnujeme v \u010dl\u00e1nku nerez A2 vs. A4<\/a>. U mal\u00fdch p\u0159\u00edm\u00fdch dr\u00e1\u017eek (DIN 84, DIN 963) je v nerezu vhodn\u00e9 db\u00e1t na kvalitn\u00ed \u0161roubov\u00e1k l\u00edcuj\u00edc\u00ed s dr\u00e1\u017ekou, aby nedo\u0161lo k vyjet\u00ed n\u00e1stroje a po\u0161kozen\u00ed dr\u00e1\u017eky.<\/p>\n

Jak mezi normami volit v praxi<\/h2>\n