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NSK Ball Screws for High-Load Drive

HTF Type

1 Specifications
Recirculation system: Ball return tube
Allowable d·n value and feed speed

Lead and allowable d·n value 20 mm or less 25 mm 30 to 32 mm

Lead 70 000 or less 70 000 or less 50 000 or less
100 000 or less
Standard ——
High-speed

d·n: Shaft diameter d (mm) × Rotational speed (min-1)

Allowable feed speed of combinations of shaft diameter and lead Unit: mm/s

Shaft dia. Lead (mm)

(mm) 10 12 14 16 20 25 30 32

32 520

36 460 550

40 410 500

45 370 440

50 330 400 460 530

55 300 360 420 480

63 310 370 420 520

80 290 330 410 360

100 260 330 290

120 220 270 240

140 230 200 170 190

160 180 150 160

200 120 130

Accuracy grade

Ct7 of JIS B 1192 (1997) is applicable as the standard accuracy grade.

Axial play

Standard axial play: 0.020 mm or less, or 0.050 mm or less

Others

Please consult NSK for special requests.
Examples: • Add a recirculation circuit to increase the load capacity.

• Position all recirculation circuits on the same phase of ball nut circumference.

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