Ball screw nuts SFU1204, SFU1605, SFU1610, SFU2005: flange diameter, bolt circle, hole size, flats and length (SFU2010 length)

sizes

5 in table

Notes

• SFU is the rolled-ball-screw flanged nut sold for CNC routers, mills and 3D printers: SFU1605 = 16 mm screw, 5 mm lead; SFU1204 = 12 mm, 4 mm; SFU1610 = 16 mm, 10 mm lead; SFU2005 = 20 mm, 5 mm. The flange has two flats (cut across the flange at the width given) and holes on the bolt circle; the barrel (Ø D) is the part that goes through the nut-housing or plate bore. The nut housings sold with the kits take the barrel; BK / BF end supports take the screw ends (HIWIN pairing, next page).
• Numbers: Sorotec's data sheet (columns BN, FN, LN, DN1, DN2, DN3, TN, d1) and Albeco's DIN 69051 SU single-flange table (D, A, B, L, W, H, Q) agree on every column for SFU1605, SFU1610 (length 57 in both) and SFU2005. SFU1204 is from Sorotec alone for the flange (Ø42, bolt circle 32, hole 4.5, thickness 8, flats 30, barrel 24); Matara's 12 × 4 flanged nut gives width 30 and height 32, which match the flats and bolt circle, but a length of 40 against Sorotec's 35. Both are real nuts (35 is the 3-turn SFU1204, 40 the 4-turn nut) but the sources do not say which, so the table shows 35 and the page warns about 40.
• Disagreements and gaps: the hole count is not stated by Sorotec or Albeco. ASE Bearings calls the SFU2005 a '4-hole flange' (OD 36, length 51, flange about 58); a ball-screw-kit data sheet (Handsontec) draws a different 1605 nut (flange Ø42, barrel Ø22, flats 34, length 36) with 6 holes for M4. Because of that no flange-with-holes file is drawn. The lube-port thread (M5 / M6) is Sorotec's TN column; the nut of the SFU2010 is listed with only its length (60).
• McMaster-Carr's ball nut and miniature ball screw categories are linked as the per-part CAD source; none of their numbers are mixed into the SFU table.
• Files: none. The tables give the nut's flange and barrel numbers but not its hole count or the shape of the flats beyond the width across, so a hole plate would be guessed.
• Left out: SFU2505, 3204, 3205 and larger (Albeco has DIN 69051 rows for them but no SFU-named table was read), SFN / SFNU and DFU double nuts, ball-screw root and ball diameters, preload and load ratings.

Ball screw nuts SFU1204, SFU1605, SFU1610, SFU2005: flange diameter… size chart

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Xem scan

File coming

No downloadable true-size file yet: the published figures do not fix the whole shape, and Xem never guesses a number. A measured scan is planned; request it and it moves up.

Plain text: sheet.txt · JSON: /api/geometry?object=ball-screw-nuts-sfu

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