SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Mounting a Bearing: Press on the Ring That Is Being Fitted, Never Through the Balls
A rolling bearing has a load path: from one ring, through the rolling elements, to the other ring. Mounting force must never take that path, because the balls and the raceways are hardened to carry a rolling load and not a hammer blow.
Press on the inner ring when fitting to a shaft. Press on the outer ring when fitting into a housing. Drive through the wrong ring and the force goes through the balls, leaving tiny dents in the raceway — BRINELLING — that the bearing then runs over thousands of times a minute.
The damage is invisible on the bench and unmistakable in service: a new bearing that rumbles, gets hot, and fails early. It is the commonest way a perfectly good bearing is destroyed before it ever turns.
Kati
2 hours
Maagizo
1
1
Everything clean, and the bearing last out of its wrapper
Everything clean, and the bearing last out of its wrapper
A bearing's working clearance is measured in microns, so a particle of grit is a boulder. Clean the shaft, the housing, the tools and your hands before the bearing comes out of its packet.
Leave it wrapped until the moment it goes on. The protective oil on a new bearing is there for storage and is compatible with most greases, so it does not need washing off unless the instructions say so — and washing it off usually introduces more contamination than it removes.
Inspect the seat rather than the bearing. Burrs, nicks and old adhesive on a shaft shoulder will hold the bearing crooked, and a bearing that is 0.05 mm out of square is being asked to run misaligned for its whole life.
Vifaa kwa hatua hii:
Kiondoa mafuta (chenye asili ya machungwa)1 kipandeZana zinazohitajika:
Glavu za mpira wa naitrili
Kalipa ya Vernier
Daftari2
2
Force on the correct ring, square and steady
Force on the correct ring, square and steady
Fitting to a SHAFT: the inner ring is the interference fit, so all force goes on the inner ring. Use a tube or a bearing fitting tool that touches only that ring.
Fitting into a HOUSING: the outer ring is the fit, so all force goes on the outer ring. If a bearing must go onto a shaft and into a housing at the same time, the tool must contact BOTH rings simultaneously.
Press steadily rather than hammering. A press or a threaded drawbar applies an even, square, controlled force; a hammer applies a sudden one at whatever angle it lands. If a hammer is unavoidable, hit a proper fitting tool and never the bearing, and never the balls.
Vifaa kwa hatua hii:
Ball Bearing - Non-Flanged (8mm Bore, 22mm OD)1 kipande
Mhimili wa chuma wa mm 301 kipandeZana zinazohitajika:
Kibanio kizito cha meza ya kazi
Nyundo ya mpira
Rula ya kunyoosha3
3
Seat it fully against the shoulder, and check
Seat it fully against the shoulder, and check
A bearing that stops a fraction short of its shoulder will be pushed the rest of the way by the first axial load it meets — after everything else has been assembled and set.
Check with a feeler gauge all the way round between the ring and the shoulder. All round matters: a gap on one side only means it is going on crooked, and further pressing will make that worse rather than better.
Then turn it by hand. A correctly mounted bearing turns smoothly with no notches and no tight spots. Roughness at this stage is either contamination, a crooked fit, or an interference so tight that it has squeezed the internal clearance out — and all three are cheaper to fix now than later.
Vifaa kwa hatua hii:
Ball Bearing - Non-Flanged (8mm Bore, 22mm OD)1 kipandeZana zinazohitajika:
Seti ya vipima nafasi
KipimadairaRula ya kunyoosha4
4
Internal clearance: the fit eats it
Internal clearance: the fit eats it
A ball bearing is made with a small gap between the balls and the raceways. Press the inner ring onto an oversized shaft and the ring stretches, closing that gap — a 15 micron interference can remove most of a standard bearing's clearance.
Then the machine warms up. The inner ring is closer to the shaft and usually hotter than the outer, so it expands more and closes the gap further. A bearing with no clearance left is preloaded by accident, runs hot, and fails fast.
That is what the C3 and C4 markings mean: bearings made with extra internal clearance for exactly these situations — tight fits, hot shafts, or both. Choosing one is not a precaution, it is the correct part for the conditions.
Vifaa kwa hatua hii:
Ball Bearing - Non-Flanged (8mm Bore, 22mm OD)1 kipande
Beringi za mipira1 kipandeZana zinazohitajika:
Kipima-unene cha dijitali cha inchi 6DaftariSeti ya vipima nafasiVifaa
4- Kishikilia Nafasi
- Ball Bearing - Non-Flanged (8mm Bore, 22mm OD)Kamisheni 10%1 kipande$1.27
- 1 kipandeKishikilia Nafasi
- 1 kipandeKishikilia Nafasi
Zana Zinazohitajika
9- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
Jumla inayokadiriwa
Kile mtengenezaji alinunua. Malighafi zisizo na bei hupatikana pale unaponunua.
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.