71821ACD/P4DGB SKF | EAN: 7316574450558 | (GTIN14: 07316574450558)
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These matched sets of two super-precision, high-capacity, D design, single row angular contact ball bearings are available in a variety of arrangements. They are designed for high-load capacity and relatively high speed operation and, compared to the equivalent SKF B and E design high-speed bearings, are best suited for heavier loads.
| Gewicht | 0,746 kg |
|---|---|
| Afmetingen | 14,2 × 13,4 × 6 cm |
| Structure group name |
Super-precision angular contact ball bearings |
| Short description |
D design ,high-capacity ,Matched set of two super-precision ,single row angular contact ball bearings |
| Brand |
SKF |
| Pack Code |
Single package |
| EAN code |
7316574450558 |
| Pack gross weight |
0.746 kg |
| Pack height |
142 mm |
| Pack length |
134 mm |
| Pack width |
60 mm |
| Pack volume |
1.142 dm3 |
| Product net weight |
0.64 kg |
| Products per pack |
1 |
| UNSPSC code UNSPSC is a taxonomy of products and services for use in eCommerce, managed by GS1 US. It is a four-level hierarchy coded as an eight-digit number, two digits for each of the four hierarchical levels. |
31-17-15-31 |
| UNSPSC name |
Angular contact bearing |
| eClass code A eClass-code is a worldwide reference-data standard for the classification and unambiguous description of products and services established in industry, commerce, trade, and the service sector. eClass consists of a four-level hierarchy of classification classes (i.e. a tree structure). 8-digit class code (in ECLASS called: CodedName) consists of two digits for each of the four hierarchical levels. |
23-05-08-04 |
| eClass name |
Spindle bearing |
| Bore diameter Inner diameter of the bearing |
105 mm |
| Outside diameter |
130 mm |
| Width |
26 mm |
| Sealing |
Without |
| Basic dynamic load rating The basic dynamic load rating Cr or Ca is the load which a bearing can theoretically endure for a basic rating life of one million revolutions. This is expressed as pure radial (Cr) load for radial bearings and pure axial (Ca) load for thrust bearings |
35.1 kN |
| Basic static load rating The basic static load rating C0r or C0a is defined as the load that results in a certain value of contact stress at the centre of contact of the most heavily loaded rolling element/raceway. C0r is indicate for radial load-, C0a is indicate for radial load rating. |
35.1 kN |
| Tolerance class |
P4U |
| Contact angle The contact angle is defined as the angle between the line joining the points of contact of the ball and the raceways in the radial plane, along which the combined load is transmitted from one raceway to another, and a line perpendicular to the bearing axis |
25° |
| Matched arrangement Angular contact ball bearing can be arrangement in different sets. ----- Back-to-back (O) or Face-to-Face (X) or Tandem (>>) ----- The O- and X-arrangements of two precision angular contact ball bearings makes it possible to take up axial loads in both directions. High axial loads in only one direction are supported by a tandem arrangement. |
Universal matching |
| QTY in matched set The number of bearings in one matched set angular contact bearings. |
2 |
| Contact type |
Normal contact (two-point contact) |
| Matched(ax.clearance/preload |
Light preload |
| Coating |
Without |
| Material bearing |
Bearing steel |
| SKF performance class |
SKF Standard |
| Afmetingen | ||
| Eigenschap naam | Waarde | |
|---|---|---|
| Boring | 105 mm | |
| Buitendiameter | 130 mm | |
| Breedte | 26 mm | |
| Contacthoek | 25 ° | |
| Prestaties | ||
| Eigenschap naam | Waarde | |
| Dynamisch draaggetal | 35.1 kN | |
| Statisch draaggetal | 57 kN | |
| Opmerking | Neem contact op met SKF voor de mogelijke toerentallen | |
| Eigenschappen | ||
| Eigenschap naam | Waarde | |
| Contacttype | Normaal contact (tweepuntscontact) | |
| Aantal rijen | 2 | |
| Type ring | Binnen- en buitenringen uit één stuk | |
| Ontwerp | Hoge capaciteit D | |
| Universeel gepaard lager | Ja, O-opstelling (), X-opstelling (>>) | |
| Gepaarde opstelling | Universeel passend | |
| Aantal lagers in gepaarde set | 2 | |
| Gepaarde conditie (axiale speling/voorspanning) | Lichte voorspanning | |
| Tolerantieklasse | P4 | |
| Materiaal, lager | Lagerstaal | |
| Coating | Zonder | |
| Afdichtingen | Zonder | |
| Smeermiddel | Geen | |
| Indicative product carbon footprint to manufacture | 2.3 kg CO2e | |
| Logistiek | ||
| Eigenschap naam | Waarde | |
| Nettogewicht van het product | 0.64 kg | |
| eClass code | 23-05-08-04 | |
| UNSPSC-code | 31171531 | |
Technische tekening -1 SKF-71821-ACD/P4DGB Afmetingen
Technische tekening -2 SKF-71821-ACD/P4DGB Inbouwmaten
Technische tekening -3 SKF-71821-ACD/P4DGB
| Beschrijving | Waarde | |
|---|---|---|
| Universeel gepaard(e) lager(s) | Ja, O-opstelling (), X-opstelling (>>) | |
| Afmetingen | ||
| Parameter | Waarde | Beschrijving |
| d | 105 mm | Boring |
| D | 130 mm | Buitendiameter |
| B | 26 mm | Breedte |
| d1 | 113.2 mm | Diameter asborst binnenring (groot zijvlak) |
| d2 | 113.2 mm | Diameter asborst binnenring (klein zijvlak) |
| D1 | 122 mm | Diameter schouder buitenring (groot zijvlak) |
| r1,2 | min. 1 mm | Afmeting afschuining |
| r3,4 | min. 0.3 mm | Afmeting afschuining |
| Inbouwmaten | ||
| Parameter | Waarde | Beschrijving |
| da | min. 109.6 mm | Diameter aanlegvlak as |
| db | min. 109.6 mm | Diameter aanlegvlak as |
| Da | max. 125.4 mm | Diameter aanlegvlak lagerhuis |
| Db | max. 128 mm | Diameter aanlegvlak lagerhuis |
| ra | max. 1 mm | Afrondingsstraal |
| rb | max. 0.3 mm | Afrondingsstraal |
| dn | 114.6 mm | Positie van oliespuitmond |
| Berekeningsgegevens | ||
| Parameter | Waarde | Beschrijving |
| C | 35.1 kN | Dynamisch draaggetal |
| C0 | 57 kN | Statisch draaggetal |
| Pu | 2.2 kN | Vermoeiingsbelastinggrens |
| To be calculated: Single bearing (8000) x speed reduction factor (see table below) | Bereikbaar toerental voor vetsmering | |
| To be calculated: Single bearing (12000) x speed reduction factor (see table below) | Bereikbaar toerental voor olie-luchtsmering | |
| α | 25 ° | Contacthoek |
| Dw | 7.144 mm | Kogeldiameter |
| i | 2 | Aantal rijen |
| z | 35 | Aantal kogels (per lager) |
| Gref | 4 cm³ | Referentiehoeveelheid smeervet (per lager) |
| VOORSPANNING EN STIJFHEID (X- OF O-OPSTELLING) | ||
| Parameter | Waarde | Beschrijving |
| B | Voorspanningsklasse | |
| G | 600 N | Voorspanning |
| 353 N/µm | Axiale stijfheid | |
| CORRECTION FACTORS FOR PRELOAD CALCULATION | ||
| Parameter | Waarde | Beschrijving |
| f | 1.44 | Correctiefactor is afhankelijk van lagerserie en -afmeting |
| f1 | 0.97 | Correctiefactor afhankelijk van contacthoek |
| f2A | 1 | Correctiefactor, voorspanning klasse A |
| f2B | 1.08 | Correctiefactor, voorspanning klasse B |
| fHC | 1 | Correctiefactor voor hybride lagers |
| FACTORS FOR EQUIVALENT BEARING LOAD CALCULATION | ||
| Parameter | Waarde | Beschrijving |
| e | 0.68 | Berekeningsfactor |
| Y1 | 0 | Axiale belastingfactor (enkel, tandem) |
| Y2 | 0.87 | Axiale belastingfactor (enkel, tandem) |
| Y0 | 0.38 | Axiale belastingfactor (enkel, tandem) |
| X1 | 1 | Radiale belastingfactor (enkel, tandem) |
| X2 | 0.41 | Radiale belastingfactor (enkel, tandem) |
| X0 | 0.5 | Radiale belastingfactor (enkel, tandem) |
| Y1 | 0.92 | Axiale belastingfactor (X- of O-opstelling) |
| Y2 | 1.41 | Axiale belastingfactor (X- of O-opstelling) |
| Y0 | 0.76 | Axiale belastingfactor (X- of O-opstelling) |
| X1 | 1 | Radiale belastingfactor (X- of O-opstelling) |
| X2 | 0.67 | Radiale belastingfactor (X- of O-opstelling) |
| X0 | 1 | Radiale belastingfactor (X- of O-opstelling) |
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Ook staan veel voorkomende vragen in de Frequently asked questions.
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Also are common quetions included in the Frequently asked questions.
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