• THK SBKN Double-Nut Ball-Retainer Ball Screw (Shaft 36-55)
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THK SBKN Double-Nut Ball-Retainer Ball Screw (Shaft 36-55)

THK SBKN Double-Nut Ball-Retainer Ball Screw (Shaft 36-55)

THK SBKN high-speed precision ball screw with ball retainer and spacer-preloaded double nut for higher load capacity than SBK.

Key features

  • Ball retainer eliminates ball collision for low noise and long maintenance-free operation
  • Double-nut spacer preload eliminates backlash with higher load capacity than SBK
  • High-speed rated: DN value 160,000
  • Supplied with G0 axial clearance (0 or less)
  • Labyrinth seal (RR) standard; wiper ring (WW) and lubricator QZ available

Specifications

Series SBKN
Nut type Double nut, spacer preload, flanged
Shaft diameter range 36-55 mm
DN value 160,000
Axial clearance G0 only (0 or less)
Accuracy grades C0, C1, C2, C3, C5, C7 (JIS B 1192 / ISO 3408; specify on order)
Lubricator QZ Optional (insert QZ after model number; not separately sold)
Code format Model + seal + clearance (+ shaft length L + accuracy)
Example SBKN5036-7.6 QZ RR G0 +1200L C5
Source THK General Catalog Ball Screw (Korean ed. 515-2K), p. A15-84-85
SBKN3620-7.6 Size: 36 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 88.1 / C0a 170.1 kN | Seal: Base model (specify options)
SBKN3620-7.6RRG0 Size: 36 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 88.1 / C0a 170.1 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN3620-7.6WWG0 Size: 36 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 88.1 / C0a 170.1 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN4020-7.6 Size: 40 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 108.9 / C0a 227.1 kN | Seal: Base model (specify options)
SBKN4020-7.6RRG0 Size: 40 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 108.9 / C0a 227.1 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN4020-7.6WWG0 Size: 40 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 108.9 / C0a 227.1 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN4030-7.6 Size: 40 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 108.1 / C0a 216.7 kN | Seal: Base model (specify options)
SBKN4030-7.6RRG0 Size: 40 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 108.1 / C0a 216.7 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN4030-7.6WWG0 Size: 40 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 108.1 / C0a 216.7 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5020-7.6 Size: 50 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 121.2 / C0a 283.7 kN | Seal: Base model (specify options)
SBKN5020-7.6RRG0 Size: 50 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 121.2 / C0a 283.7 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5020-7.6WWG0 Size: 50 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 121.2 / C0a 283.7 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5030-7.6 Size: 50 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 120.8 / C0a 269.9 kN | Seal: Base model (specify options)
SBKN5030-7.6RRG0 Size: 50 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 120.8 / C0a 269.9 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5030-7.6WWG0 Size: 50 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 120.8 / C0a 269.9 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5036-7.6 Size: 50 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 120.1 / C0a 271.6 kN | Seal: Base model (specify options)
SBKN5036-7.6RRG0 Size: 50 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 120.1 / C0a 271.6 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5036-7.6WWG0 Size: 50 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 120.1 / C0a 271.6 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5520-7.6 Size: 55 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 127.2 / C0a 314.6 kN | Seal: Base model (specify options)
SBKN5520-7.6RRG0 Size: 55 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 127.2 / C0a 314.6 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5520-7.6WWG0 Size: 55 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 127.2 / C0a 314.6 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5530-7.6 Size: 55 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 126.4 / C0a 297.3 kN | Seal: Base model (specify options)
SBKN5530-7.6RRG0 Size: 55 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 126.4 / C0a 297.3 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5530-7.6WWG0 Size: 55 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 126.4 / C0a 297.3 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5536-7.6 Size: 55 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 125.9 / C0a 299 kN | Seal: Base model (specify options)
SBKN5536-7.6RRG0 Size: 55 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 125.9 / C0a 299 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5536-7.6WWG0 Size: 55 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 125.9 / C0a 299 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
Ball ScrewsTHK
27 product codes available in this family
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THK SBKN Double-Nut Ball-Retainer Ball Screw (Shaft 36-55)

Brand THK·Ball Screws

Available part numbers (27)

SBKN3620-7.6, SBKN3620-7.6RRG0, SBKN3620-7.6WWG0, SBKN4020-7.6, SBKN4020-7.6RRG0, SBKN4020-7.6WWG0, SBKN4030-7.6, SBKN4030-7.6RRG0, SBKN4030-7.6WWG0, SBKN5020-7.6 + 17 more — see full table ↓

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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.

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Product codes & specifications
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Product codeSpec
SBKN3620-7.6Size: 36 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 88.1 / C0a 170.1 kN | Seal: Base model (specify options)
SBKN3620-7.6RRG0Size: 36 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 88.1 / C0a 170.1 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN3620-7.6WWG0Size: 36 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 88.1 / C0a 170.1 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN4020-7.6Size: 40 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 108.9 / C0a 227.1 kN | Seal: Base model (specify options)
SBKN4020-7.6RRG0Size: 40 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 108.9 / C0a 227.1 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN4020-7.6WWG0Size: 40 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 108.9 / C0a 227.1 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN4030-7.6Size: 40 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 108.1 / C0a 216.7 kN | Seal: Base model (specify options)
SBKN4030-7.6RRG0Size: 40 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 108.1 / C0a 216.7 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN4030-7.6WWG0Size: 40 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 108.1 / C0a 216.7 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5020-7.6Size: 50 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 121.2 / C0a 283.7 kN | Seal: Base model (specify options)
SBKN5020-7.6RRG0Size: 50 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 121.2 / C0a 283.7 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5020-7.6WWG0Size: 50 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 121.2 / C0a 283.7 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5030-7.6Size: 50 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 120.8 / C0a 269.9 kN | Seal: Base model (specify options)
SBKN5030-7.6RRG0Size: 50 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 120.8 / C0a 269.9 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5030-7.6WWG0Size: 50 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 120.8 / C0a 269.9 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5036-7.6Size: 50 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 120.1 / C0a 271.6 kN | Seal: Base model (specify options)
SBKN5036-7.6RRG0Size: 50 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 120.1 / C0a 271.6 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5036-7.6WWG0Size: 50 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 120.1 / C0a 271.6 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5520-7.6Size: 55 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 127.2 / C0a 314.6 kN | Seal: Base model (specify options)
SBKN5520-7.6RRG0Size: 55 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 127.2 / C0a 314.6 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5520-7.6WWG0Size: 55 x 20 mm | Circuits: 2x3.8 | Load rating: Ca 127.2 / C0a 314.6 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5530-7.6Size: 55 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 126.4 / C0a 297.3 kN | Seal: Base model (specify options)
SBKN5530-7.6RRG0Size: 55 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 126.4 / C0a 297.3 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5530-7.6WWG0Size: 55 x 30 mm | Circuits: 2x3.8 | Load rating: Ca 126.4 / C0a 297.3 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)
SBKN5536-7.6Size: 55 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 125.9 / C0a 299 kN | Seal: Base model (specify options)
SBKN5536-7.6RRG0Size: 55 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 125.9 / C0a 299 kN | Seal: RR (labyrinth seal) | Clearance: G0 (0 or less, preloaded)
SBKN5536-7.6WWG0Size: 55 x 36 mm | Circuits: 2x3.8 | Load rating: Ca 125.9 / C0a 299 kN | Seal: WW (wiper ring) | Clearance: G0 (0 or less, preloaded)

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