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    THK BK Support Unit, Fixed Side, Square (Bore 10-40)

    THK BK Support Unit, Fixed Side, Square (Bore 10-40)

    Square-housing fixed-side support unit for ball screws of 14-55 mm shaft diameter, with DF angular contact bearings, lock nut and seals.

    Key features

    • Fixed-side unit with DF-arranged 30 deg contact angle angular ball bearings (P5 class)
    • Rigid square housing with through holes and counterbores for bolting from top
    • Supplied with retainer cover, collars, two seals, lock nut and set screw with set piece
    • Pairs with BF support-side unit of the same height; use recommended shaft end J (J1/J2/J3)
    • DB bearing arrangement available on request

    Specifications

    Brand THK
    Series BK
    Side Fixed side
    Housing Square (block)
    Bore range 10 - 40 mm
    Bearing Angular contact, DF set, P5
    Matching support side BF
    Recommended shaft end J1 / J2 / J3
    Dimensions L x B x H
    Source THK General Catalog Ball Screw (Korean ed. 515-2K), p. A15-352-353
    BK10 Shaft dia d: 10 mm | L x B x H: 25 x 60 x 39 mm | Bearing: 7000 equiv. (DF, P5) | Axial Ca / perm. load: 6.08 / 3.1 kN | Axial rigidity: 65 N/um | Mass: 0.39 kg
    BK12 Shaft dia d: 12 mm | L x B x H: 25 x 60 x 43 mm | Bearing: 7001 equiv. (DF, P5) | Axial Ca / perm. load: 6.66 / 3.25 kN | Axial rigidity: 88 N/um | Mass: 0.41 kg
    BK15 Shaft dia d: 15 mm | L x B x H: 27 x 70 x 48 mm | Bearing: 7002 equiv. (DF, P5) | Axial Ca / perm. load: 7.6 / 4 kN | Axial rigidity: 100 N/um | Mass: 0.57 kg
    BK17 Shaft dia d: 17 mm | L x B x H: 35 x 86 x 64 mm | Bearing: 7203 equiv. (DF, P5) | Axial Ca / perm. load: 13.7 / 5.85 kN | Axial rigidity: 125 N/um | Mass: 1.27 kg
    BK20 Shaft dia d: 20 mm | L x B x H: 35 x 88 x 60 mm | Bearing: 7004 equiv. (DF, P5) | Axial Ca / perm. load: 12.7 / 7.55 kN | Axial rigidity: 140 N/um | Mass: 1.19 kg
    BK25 Shaft dia d: 25 mm | L x B x H: 42 x 106 x 80 mm | Bearing: 7205 equiv. (DF, P5) | Axial Ca / perm. load: 20.2 / 11.5 kN | Axial rigidity: 190 N/um | Mass: 2.3 kg
    BK30 Shaft dia d: 30 mm | L x B x H: 45 x 128 x 89 mm | Bearing: 7206 equiv. (DF, P5) | Axial Ca / perm. load: 28 / 16.3 kN | Axial rigidity: 195 N/um | Mass: 3.32 kg
    BK35 Shaft dia d: 35 mm | L x B x H: 50 x 140 x 96 mm | Bearing: 7207 equiv. (DF, P5) | Axial Ca / perm. load: 37.2 / 21.9 kN | Axial rigidity: 255 N/um | Mass: 4.33 kg
    BK40 Shaft dia d: 40 mm | L x B x H: 61 x 160 x 110 mm | Bearing: 7208 equiv. (DF, P5) | Axial Ca / perm. load: 44.1 / 27.1 kN | Axial rigidity: 270 N/um | Mass: 6.5 kg
    Ball Screw Support UnitsTHK
    9 product codes available in this family
    Sourced direct from KoreaExport-ready supplyCompetitive pricing
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    THK BK Support Unit, Fixed Side, Square (Bore 10-40)

    Brand THK·Ball Screw Support Units

    Available part numbers (9)

    BK10, BK12, BK15, BK17, BK20, BK25, BK30, BK35, BK40

    How to order

    Send the THK part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

    RFQ List 0 →
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    Product codes & specifications
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    Product codeSpec
    BK10Shaft dia d: 10 mm | L x B x H: 25 x 60 x 39 mm | Bearing: 7000 equiv. (DF, P5) | Axial Ca / perm. load: 6.08 / 3.1 kN | Axial rigidity: 65 N/um | Mass: 0.39 kg
    BK12Shaft dia d: 12 mm | L x B x H: 25 x 60 x 43 mm | Bearing: 7001 equiv. (DF, P5) | Axial Ca / perm. load: 6.66 / 3.25 kN | Axial rigidity: 88 N/um | Mass: 0.41 kg
    BK15Shaft dia d: 15 mm | L x B x H: 27 x 70 x 48 mm | Bearing: 7002 equiv. (DF, P5) | Axial Ca / perm. load: 7.6 / 4 kN | Axial rigidity: 100 N/um | Mass: 0.57 kg
    BK17Shaft dia d: 17 mm | L x B x H: 35 x 86 x 64 mm | Bearing: 7203 equiv. (DF, P5) | Axial Ca / perm. load: 13.7 / 5.85 kN | Axial rigidity: 125 N/um | Mass: 1.27 kg
    BK20Shaft dia d: 20 mm | L x B x H: 35 x 88 x 60 mm | Bearing: 7004 equiv. (DF, P5) | Axial Ca / perm. load: 12.7 / 7.55 kN | Axial rigidity: 140 N/um | Mass: 1.19 kg
    BK25Shaft dia d: 25 mm | L x B x H: 42 x 106 x 80 mm | Bearing: 7205 equiv. (DF, P5) | Axial Ca / perm. load: 20.2 / 11.5 kN | Axial rigidity: 190 N/um | Mass: 2.3 kg
    BK30Shaft dia d: 30 mm | L x B x H: 45 x 128 x 89 mm | Bearing: 7206 equiv. (DF, P5) | Axial Ca / perm. load: 28 / 16.3 kN | Axial rigidity: 195 N/um | Mass: 3.32 kg
    BK35Shaft dia d: 35 mm | L x B x H: 50 x 140 x 96 mm | Bearing: 7207 equiv. (DF, P5) | Axial Ca / perm. load: 37.2 / 21.9 kN | Axial rigidity: 255 N/um | Mass: 4.33 kg
    BK40Shaft dia d: 40 mm | L x B x H: 61 x 160 x 110 mm | Bearing: 7208 equiv. (DF, P5) | Axial Ca / perm. load: 44.1 / 27.1 kN | Axial rigidity: 270 N/um | Mass: 6.5 kg

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