Ural/Dnepr. Bearings and their imported analogues. Oil seals.
Dear Colleagues, Brothers! I decided to write another article on the selection of bearings for the Urals and Dnieper to help you. I work for a bearing company, so you can rest assured of my knowledge and understanding of this issue. I think that my experience and information that I want to share with you will be useful to you.
TABLE OF BEARINGS FROM THE MANUAL : Motorcycles Ural Dnepr. Operation and repair. (Initial information)
The electronic version of the manual can be viewed here https://v-karbyrator.narod.ru/motocikly-ural-dnepr-ekspluataciya-i-remont…
BEARING SELECTION TABLE . (slightly modified, repeats the previous table, taking into account additions and corrections)
All POSSIBLE ANALOGUES (in blue) can only be used with modifications to the design!
ROLLERS in the gearbox 5x12 only in the drive gearbox (differential) 3x15.8 gearbox (driven gear wheel hub)
TABLE OF CONFORMITY OF IMPORTED ANALOGUES WITH DOMESTIC ANALOGUES . https://bearing-service.ru/info/table_ob/ Instead of the last two zeros, we substitute the diameter of the shaft divided by 5. Example In the corresponding line of the table we substitute Shaft 25 25/5=5 we substitute 200+05=> 205 = 6205 Shaft 50 50 /5=10 substitute 300+10=> 310 = 6310
————————————————————————————— TECHNICAL INFORMATION ABOUT BEARINGS ————————————————— ———————————- DRAWINGS AND DIMENSIONS OF BEARINGS BY MARKING (enter the designation in the line - Search by designation) IMPORTED https://www.skf.com/portal/skf_ru/home/products?maincatalogue=1&lang =ru&n... IMPORTED NEEDLES https://iko-bearings.ru/podshipniki/ DOMESTIC (by marking) https://autoshtamp.ru/encatalog.phtml For sizes on the same site, go to the tab - DIRECTORIES / TECHNICAL SEARCH
—————————————————————————————————————————————— TOLERANCES, LANDINGS, DESCRIPTION BEARING TYPES, DRAWINGS, DIMENSIONS ———————————————————————————————————————————— — Look HERE (download — General Catalog) https://www.pkspb.ru/support/catalogues/skf/
—————————————————————————————————————————————— DECODING MARKINGS AND LETTER DESIGNATIONS BEARINGS ——————————————————————————————————————————————— I describe the interpretation of bearings with a ball bearing groups, since ball bearings are generally more common in the motorcycle industry.
IMPORTED BEARINGS LETTER DESIGNATIONS
2RS - contact seal on 2 sides made of rubber, reinforced with sheet steel (and various variations) RS - contact seal on one side made of rubber, reinforced with sheet steel (and various variations) 2Z - protective washers made of metal on both sides (and various variations) Z – protective washers made of metal on one side (and various variations) C3 – increased thermal gap (for high rotation speeds and temperatures) As a rule, C3 is used at high speeds, or when the temperature from adjacent parts is transferred to the bearing at a temperature of more than 70-80 degrees (from 70-80 to 100), usually from the shaft. The thermal conductivity of housings is almost always higher than that of shafts; therefore, the temperature of the inner ring of the bearing and its rolling elements is 5–10°C higher than the temperature of the outer ring. C3 and C4 are needed to prevent the bearing from jamming due to overheating. N, NR - retaining ring with soda groove (NR - complete with retaining ring) Separators: Steel (J), Brass (M), Polyamide (TN9) - textolite.
Example decoding: 6204-2RS/С3 (analogue 76-180204) 2RS - contact seal on 2 sides made of rubber, reinforced with sheet steel C3 - increased thermal clearance 204 - standard size of the bearing in internal and external dimensions
— I RECOMMEND installing bearings with increased thermal clearance C3 for high rotation speeds and temperatures
— Of the normal imported bearings, I recommend using the following brands: SKF (Sweden), FAG (Germany), IBC (Germany), IKO (Japan) - needle, Asahi (Japan), Nachi (Japan), NSK (Japan), NTN (Japan) ).
——————————————————— DOMESTIC BEARINGS ———————————————————
ALPHANUMERIC CODING OF DOMESTIC BEARINGS (for your understanding): The number of a domestic bearing consists of: Clearance - Accuracy class - Perfix - Number (by size) - Letter designation
ACCURACY CLASS (up to the bearing number) 0, 6, 5, 4, 3, 2, 1 Sometimes, when repairing old equipment, you encounter bearings with an accuracy class indicated by the letters N-, P-, VP-, V-, AB-, A-, SA-, C is the old designation of accuracy classes.
0, 6 - accuracy class for everyday use 5, 4 - accuracy class for machine tools (more accurate) - The rest are not important for us (no point, high cost and not available, it’s better to use imports)
Application of accuracy classes in industry https://nacherchy.ru/klassi_tochnosti.html
An example of decoding numbers 76-180204 A (analogous to 6204-2RS/C3) 76 – gap (corresponds to C3 - increased), accuracy class 6 180 – contact seal on 2 sides made of rubber, reinforced with sheet steel (in import 2RS) 204 – bearing size according to internal and external dimensions A - bearings with increased load capacity
Explanation of perfixes (in the bearing number itself, on the front): 180 – contact seal on 2 sides made of rubber, reinforced with sheet steel (in import 2RS) 160 – contact seal on one side made of rubber, reinforced with sheet steel (in import RS) 80 – protective metal washers on both sides (in import 2Z) 60 – protective washers made of metal on both sides (in import Z) 76 – gap (increased thermal gap C3), accuracy class 6 70 – gap (increased thermal gap C3) 50 – under retaining ring (in import NR)
NOTE In imports as well as in Russia, the last 2 digits are the shaft diameter 04x5 = 20 mm (the last 2 digits are multiplied by 5 with the exception of small diameters up to 10 mm)
COMMONLY USED LETTER INDEX (after bearing number)
L - Separator made of brass (in import M) E - Separator made of textolite (in import TN9)
If there are no letters (L, E, G, D) at the end of the bearing number, the cage is steel. — You can probably only pay attention to the letter indices L, E. — You can ignore the rest. Most likely, these requirements are not met or are not essential.
More details on domestic designations and decoding https://autoshtamp.ru/oboz.phtml https://www.epkgroup.ru/content/blogcategory/82/140/lang,ru/ https://podshipnik.narod.ru/ p2.html/name_bearings23.htm
— From normal domestic ones, you can use bearings produced by: Samara Bearing Plant OJSC (SPZ or GPZ-9) Volzhsky Bearing Plant OJSC (VPZ) Previously, bearings were also supplied for import.
SEAL SELECTION TABLE.
And also the size of the cuffs
Engine Ural 650 and lower valves (50x70, 16x30)
Engine Ural 750 (55x80, 16x30)
Engine Dnepr (60x85, 16x30)
Ural gearbox until 2005 (32x45, 35x48, 20x40, 12x25 2 pcs, slider ring)
Gearbox Dnepr (32x45, 35x48, 20x34, 16x30, slider ring)
Gearbox Ural until 2006 (45x59)
Gearbox Ural after 2006 (45x60)
ATTENTION - check the dimensions of the gearbox secondary shaft oil seal - 35x48 or 36x48. The earlier ones are 35, the later ones are 36.
AUTOMOTIVE SEALS
I came across one link Seals for imported cars https://cars.febi-parts.com/3d.php Interactive catalog In order to view the seals you need to type: Universal parts and parts according to DIN/Seal (click on the picture of the seal and a list will appear )
For each oil seal there are dimensions, material, make of car where it is installed and the code number of the oil seal.
I think this link will be useful.
—————————————————————————————————————————————- I hope that this article is helpful to you will help you select the right bearings and seals! -------------------------------------------- GOOD LUCK TO ALL!!!! ! NO NAIL, NO ROD!!!!!
Ural motorcycle generator bearing size
In order for the rubbing metal parts of various designs to serve as long as possible, elements such as bearings are installed. They reduce stress and protect other parts from too rapid wear caused by friction. It is not difficult to notice that it is time to change the bearing. As a rule, its wear is accompanied by the appearance of noise unusual for equipment. If your Ural generator begins to make unusual sounds, it’s time to start servicing the unit. And if a new bearing 62203-2RS is required, you can always install its analogue. These are the products presented on this page. Bearing 180503 can be ordered either individually or in bulk.
Bearings
(use in motorcycles IMZ-8.103-10/40, IMZ-8.123-10, IMZ-8.107 Ural)
On the website of the Tehnoprofsnab Company, in the section "Bearings (application)", you will find information about the applicability of bearings in motorcycles, brands such as : IMZ-8.103-10/40, IMZ-8.123-10, IMZ-8.107 Ural, Minsk, Voskhod, IZH, YAVA, Dnepr, Ural. The information is presented in the form of tables, which indicate: Bearing designation, Bearing type, Bearing installation location, Quantity (in this unit). The brand of equipment is indicated at the top of the table. Follow the links below with a description of the model you are interested in.
GENERATOR 500 W. REPAIR
AN INDEPENDABLE GUY WITH A BAD CHARACTER
“Ural” 500-watt generator 14.3771 - the unit is excessively noisy and not very reliable. But oppositionists, having tasted the charm of powerful light and forgotten about discharged batteries, prefer to put up with its shortcomings. And not to change it, but to repair it. In general, this is not difficult to do. We have already written about how to find a fault in the electrical circuits of a generator (“Moto” No. 3, 1998). Now we will assemble and disassemble the unit, and at the same time we will eliminate these same malfunctions.
First, remove the rectifier cover by prying it off with a screwdriver. If this is done carefully, the latch antennae securing it will not break. But later we recommend screwing an M5 nut onto the protruding ends of two opposite tightening bolts - it’s more reliable. Then unscrew the two screws securing the relay-regulator and carefully remove it complete with the brush assembly. The relay-regulator YA212A11E itself fails extremely rarely, but if this happens, know that in addition to the “native” one, similar 36.3702 or 361.3702, used on the generators of the Vladimirets tractors and modern Volgas with the ZMZ 406 engine, will be suitable. The differences between them are in the level of charging voltage: 36.3702 - 14.2 V, and 361.3702 -14.4 V. Higher voltage is useful at low temperatures and frequent short trips with light. During normal use, the “stepson” will cause a slight reduction in battery life.
1. Unscrew the castle nut securing the gear. This is not as easy to do as it seems at first glance - there is no flat on the rotor that you could grab with a key. The problem can be solved with the help of large pliers (hold the base of the gear, not the teeth!). When assembling, place a copper or brass washer under the nut - this will protect its threaded part from loosening.
