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139 types · Instant Quote

Bearing & Seal Adapters Manufacturing

Bearing spacers, distance sleeves, seal housings and adjusting collars: 15 families, 139 types. h7/h8 tolerance, ⌀6.4–20 mm, steel/stainless/brass. Request a quote.

Manufacturing Scope

Bearing and seal adapters are precision turned parts that axially position bearings on a shaft–housing assembly, seat inner and outer races, and hold the radial shaft seal. They are used in gearboxes, electric motors, pumps, automation modules and general machinery to set bearing clearance, apply preload and ensure sealing. This category covers 15 families and 139 types in total: bearing spacer rings, plain and stepped spacer rings, inner-race adapters, adjusting and knurled adjusting collars, hex distance spacers, threaded spacer bushings, bearing sleeves, seal housing sleeves, O-ring-grooved sealing rings, spacer and reducing sleeves, plus threaded and knurled seal sleeves. Material options are steel, stainless steel, brass and aluminium. ISO fits such as h7/h8/h9 on mating diameters and H8 on housing bores, ±0.01 mm precision, chamfers, knurling, M-threads (with DIN 76 thread runout) and O-ring grooves are produced in a single setup. Machining runs on the Goodway SW-20 Swiss lathe across the ⌀6.4–20 mm range. Beyond the 139 catalog types, we manufacture custom sizes from your technical drawing; requests with part code, material and quantity are priced on a quotation basis.

15 families139 types⌀6.4–20 mm4 materials
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Part Families

Bearing Spacer RingPlain cylindrical spacer ring providing axial distance between two bearings.10 types⌀8–20 mmOpen the code & size table →Spacer RingLong cylindrical spacer ring setting axial clearance on a shaft.10 types⌀9–20 mmOpen the code & size table →Stepped Spacer RingStepped spacer with two diameters seating inner and outer bearing races separately.9 types⌀12–20 mmOpen the code & size table →Inner Race AdapterAdapter ring with tapered transition fitting a small shaft to a larger bearing inner race.9 types⌀10–20 mmOpen the code & size table →Adjusting CollarAdjusting collar fixed to the shaft via a set screw in a radial threaded hole.10 types⌀12–20 mmOpen the code & size table →Knurled Adjusting CollarAdjusting collar with a knurled outer surface for hand adjustment, fixed on the shaft.10 types⌀12–20 mmOpen the code & size table →Hex Distance SpacerHex-bodied distance spacer with wrench flats and an internal thread or bore.11 types⌀6.4–19.6 mmOpen the code & size table →Threaded Spacer BushingThreaded spacer bushing with an external thread at one end and a shoulder at the other.10 types⌀9–18 mmOpen the code & size table →Bearing SleeveStepped thin-wall sleeve locating the bearing outer race.10 types⌀12–20 mmOpen the code & size table →Seal Housing SleeveShouldered sleeve housing a radial shaft seal in its bore.9 types⌀15–20 mmOpen the code & size table →Sealing RingShort-wall sealing ring with an O-ring groove.8 types⌀12–20 mmOpen the code & size table →Spacer SleevePlain-wall spacer sleeve setting distance between two bearings.9 types⌀10–20 mmOpen the code & size table →Reducing SleeveStepped reducing sleeve adapting a shaft to a larger bore.8 types⌀14–20 mmOpen the code & size table →Threaded Seal SleeveExternally threaded seal-retaining sleeve screwed into a housing.8 types⌀14–20 mmOpen the code & size table →Knurled Press SleeveRetaining sleeve with knurled outer surface for press fit into a bore.8 types⌀12–20 mmOpen the code & size table →

Frequently Asked Questions

How are bearing spacers and distance sleeves manufactured?

Parts are turned from bar stock in a single operation on the Goodway SW-20 Swiss lathe. The bore, outer diameter, chamfer, knurling and any M-thread are machined in the same setup, preserving concentricity and surface quality. Standard fits are h7/h8, housing bores H8, with typical precision of ±0.01 mm. Dimensions can be optimised to match your bearing or seal catalog.

Which materials can I order?

We machine steel, stainless steel (304/316 grade), brass and aluminium. Steel is used for load-bearing spacers, stainless for corrosion, food or chemical environments, brass for hand-turned knurled collars and seal sleeves, and aluminium where light weight matters. We can select the material together based on the operating environment.

What tolerances do you work to?

We use ISO shaft tolerance h7 (precise) on bearing fits, h8/h9 on general spacer rings, H8 on seal and housing bores, and 6g/6H on threads. Typical dimensional precision is ±0.01 mm. Tighter tolerances and surface-roughness values for critical seating faces can be specified on your drawing.

Do you produce custom sizes from my own technical drawing?

Yes. The 139 standard types are a starting point; our core work is custom turned production from a drawing. Just send your PDF/STEP drawing with inner diameter, outer diameter, length, tolerance and material. We manufacture spacer, adjusting, reducing and seal sleeves to your dimensions within the ⌀6.4–20 mm range.

How are price and lead time determined?

Pricing is quotation-based; there are no fixed numbers on the site because price depends on material, tolerance, quantity and drawing complexity. Send the part code (e.g. RULA-ABL-06) or a drawing with material and quantity, and we usually reply within 24 hours with a firm quote and estimated lead time. We have manufactured in Düzce, Türkiye since 2009 and serve both domestic and export orders.

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