STH-255 Swiveling Spindle Head

Employs high rigidity, extra large radial and axial bearing.
The spindle head employs the latest full circumference brake, featuring even braking force without runout. Maximum clamping area, higher clamping force, no vibration and no braking delay is required. High torque combined with compact, rigid and enclosed structure ensure high cutting quality.
High quality cast iron with maximum durability of material, increased wall thickness of body to increase the structural strength. One-piece thru-hole spindle integrates features of high strength, heavy cutting resistance and high machining accuracy.
Various sheet metal guards are available to suit various brands of motors. Contact us for detail.

Specifications

MODEL	UNIT	STH-255
Tilting angle	deg.	±110
Teeth ratio	/	1:120
Width of guide block	mm	18h7
Servo motor type (Recommended)	Motor Brand	Tilt ing Axis
	FANUC	α8i / ß12is
	Mitsubishi	HF-154S
Max. speed of indexing p late	rpm	22.2
Indexing accuracy	sec.	15
Repeatability accuracy	sec.	6
Clamping torque	N.m	600
Allowable torque on worm gear	N.m	380
Range of tilting angle	deg.	±110
Clamping method	kg.m²	35(Hyd.)
Minimum setting angle	deg.	0.001
Weight of spindle head (motor not induded)	kg	177

*The specifications, dimensions and design characteristics shown in this
catalogue are subject to change without prior notice.

Dimensional Drawings