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Pillow Block Bearing: a Grey-Iron Housing Bored for a Ball Bearing
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Forge

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Forge

19. Ukwakira 2026NO
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Pillow Block Bearing: a Grey-Iron Housing Bored for a Ball Bearing

A pillow block holds a shaft in a bearing parallel to the surface it is bolted to. Heavy housings are commonly grey cast iron, the bearing is usually 52100 steel, and the shaft is held with set screws or collars (Wikipedia, Pillow block bearing). This one is a housing cast in grey iron, bored on the lathe and fitted with a ball bearing, for an 8 mm shaft. Design and sizes are ours. The picture: our drawing.
Hejuru
2 days

Amabwiriza

1

Make the pattern

From pine, make a pattern: a flat base 90 × 25 mm with a lug at each end, and a round boss rising from its middle about 40 mm across, its axis parallel to the base. Allow a little extra on the boss for boring, and taper all sides so it draws.

Ibikoresho bikenewe:

Ikibaho cy'igiti cya pinusiIkibaho cy'igiti cya pinusi
Umucumita w'ImigororwaUmucumita w'Imigororwa
Ibikoresho by'amasuka y'igitiIbikoresho by'amasuka y'igiti
Ikigereranyo cya Digitale cy'Amasentimetero 6Ikigereranyo cya Digitale cy'Amasentimetero 6
2

Melt the iron

Melting pig iron in the cupola and tapping it into the ladle.
3

Mould and pour

Ram the pattern up in the flask, draw it, cut a sprue and runner, and pour grey iron from the ladle. Let it cool in the sand, then shake it out and grind off the sprue and fins.

Ibikoresho by'iyi ntambwe:

Ibice by'icyuma kitatunganyijweIbice by'icyuma kitatunganyijwe1.5 kg

Ibikoresho bikenewe:

Umucanga wo guteraUmucanga wo gutera
Agasanduku ko kubumbamoAgasanduku ko kubumbamo
Isuka NtoyaIsuka Ntoya
Ikiyiko cyo gusuka icyumaIkiyiko cyo gusuka icyuma
Isaruro ry'impandeIsaruro ry'impande
Uturindantoki two gukomeza ibyumaUturindantoki two gukomeza ibyuma
Ikanzu y'uruhuIkanzu y'uruhu
Ingabo y'IsuraIngabo y'Isura
4

Face the base and bore

File or grind the base flat. Bolt the housing to the lathe faceplate with the boss's axis on the lathe centre and the base parallel to it, and bore the boss to a light press fit for the ball bearing's outer race.

Ibikoresho bikenewe:

Imashini yo guhinguza icyumaImashini yo guhinguza icyuma
Urupapuro rw'itoreroUrupapuro rw'itorero
Igiti cyo gukata imbere mu mwoboIgiti cyo gukata imbere mu mwobo
Ikigereranyo cya Digitale cy'Amasentimetero 6Ikigereranyo cya Digitale cy'Amasentimetero 6
Amakariso MenshiAmakariso Menshi
Amadarubindi y'umutekanoAmadarubindi y'umutekano
5

Slot the lugs

Drill and file a slot in each lug for a mounting bolt, square to the base, so the block can be lined up before it is tightened.

Ibikoresho bikenewe:

Icyuma Cyivumbura GihagazeIcyuma Cyivumbura Gihagaze
Ibyuma Byinshi byo GucukuraIbyuma Byinshi byo Gucukura
Amakariso MenshiAmakariso Menshi
Ifatiro ry'AmezaIfatiro ry'Ameza
6

Press in the bearing

Press the ball bearing squarely into the bore, pushing on the outer race only. Check the inner race turns freely; the shaft is then held in it with set collars.

Ibikoresho by'iyi ntambwe:

Bearing y'utubumbeBearing y'utubumbe1 igice

Ibikoresho bikenewe:

Ifatiro ry'AmezaIfatiro ry'Ameza
Inyundo ifite umutwe utambitseInyundo ifite umutwe utambitse

Ibikoresho

2

Ibikoresho bikenewe

21

Iki gishushanyo gikora

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Agateganyo

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Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

Casting Iron in a Cupola Furnace — Re-Melting Pig Iron into Finished Castings

Casting Iron in a Cupola Furnace — Re-Melting Pig Iron into Finished Castings

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CC0 Umurenge rusange

Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.

Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.

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