Rotary + Linear

Precision Rotary Ball Splines

Rotary ball splines integrate a support bearing on the spline nut, so the nut can rotate while the shaft moves linearly. Ideal for Z-θ axes, indexing and rotating pick heads.

Φ8–Φ60 mm

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Structure

Structure & Working Principle

Angular-contact support bearing integrated on the nut
Pulley or gear can be mounted directly on the flange
ULTR and ULTR B catalog versions; load and bearing review required
Low inertia for fast acceleration

Series & Models

Rotary Ball Splines Series

Light-Duty Rotary · ULTR

Compact rotary nut for light loads.

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Heavy-Duty Rotary · ULTR B

Larger bearing for higher moment loads.

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All catalog models (11)

Model	Shaft d / OD D (mm)	C (N)	C₀ (N)	Details
ULTR 8	8 / 32	1450	2870	View model →
ULTR 10	10 / 36	2670	4890	View model →
ULTR 16	16 / 48	6120	11200	View model →
ULTR 20	20 / 56	8900	16300	View model →
ULTR 25	25 / 66	12800	23200	View model →
ULTR 40	40 / 100	30800	37500	View model →
ULTR 16B	16 / 52	6120	11200	View model →
ULTR 20B	20 / 60	8900	16300	View model →
ULTR 25B	25 / 72	12800	23200	View model →
ULTR 40B	40 / 108	30800	37500	View model →
ULTR 60B	60 / 134	47700	79500	View model →

Engineering

Before Selecting a Model

Shaft and housing envelope, nut retention / flange dimensions, shaft length, travel, radial load and load direction, torque, speed, duty cycle, accuracy, preload and lubricant/environment.

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