Stationary Field Tooth Clutches

SFTC Series(Must be used with PWM Controller)

Stationary Field Tooth Clutches

3 to 10.5” diameter; 2 to 7.5” length
Bore sizes from 0.5 to 4.25”
Static torque from 40 to 5200 lb-ft
1400 to 3500 RPM
Operates both dry and in oil
Modified designs and customized assemblies available

Available Downloads

Resources

Questions? (607) 732-2030

Performance / Mechanical Specifications	SFTC Series — Model Size
		SFTC - 320	SFTC - 375	SFTC - 450	SFTC - 525	SFTC - 630	SFTC - 760	SFTC - 895	SFTC - 1065
STP File Model		Model: SFTC - 320 3D	Model: SFTC - 375 3D	Model: SFTC - 450 3D	Model: SFTC - 525 3D	Model: SFTC - 630 3D	Model: SFTC - 760 3D	Model: SFTC - 895 3D	Model: SFTC - 1065 3D	Model:
Torque Rating (Static)	lb-ft	Model: SFTC - 320 40	Model: SFTC - 375 80	Model: SFTC - 450 160	Model: SFTC - 525 320	Model: SFTC - 630 650	Model: SFTC - 760 1300	Model: SFTC - 895 2600	Model: SFTC - 1065 5200	Model:
	(Nm)	Model: SFTC - 320 (54.2)	Model: SFTC - 375 (108.5)	Model: SFTC - 450 (216.9)	Model: SFTC - 525 (433.9)	Model: SFTC - 630 (881.3)	Model: SFTC - 760 (1762.6)	Model: SFTC - 895 (3525.1)	Model: SFTC - 1065 (7050.2)	Model:
Recommended Max Speed	rpm	Model: SFTC - 320 3500	Model: SFTC - 375 3000	Model: SFTC - 450 2500	Model: SFTC - 525 2000	Model: SFTC - 630 1600	Model: SFTC - 760 1500	Model: SFTC - 895 1400	Model: SFTC - 1065 1400	Model:
Body Diameter	in	Model: SFTC - 320 3.16	Model: SFTC - 375 3.75	Model: SFTC - 450 4.50	Model: SFTC - 525 5.25	Model: SFTC - 630 6.32	Model: SFTC - 760 7.60	Model: SFTC - 895 8.94	Model: SFTC - 1065 10.65	Model:
	(mm)	Model: SFTC - 320 (80.26)	Model: SFTC - 375 (95.25)	Model: SFTC - 450 (114.30)	Model: SFTC - 525 (133.35)	Model: SFTC - 630 (160.53)	Model: SFTC - 760 (193.04)	Model: SFTC - 895 (227.08)	Model: SFTC - 1065 (270.51)	Model:
Overall Length (ref)	in	Model: SFTC - 320 2.07	Model: SFTC - 375 2.33	Model: SFTC - 450 2.61	Model: SFTC - 525 2.94	Model: SFTC - 630 3.55	Model: SFTC - 760 4.23	Model: SFTC - 895 5.04	Model: SFTC - 1065 6.18	Model:
	(mm)	Model: SFTC - 320 (52.58)	Model: SFTC - 375 (59.18)	Model: SFTC - 450 (66.29)	Model: SFTC - 525 (74.68)	Model: SFTC - 630 (90.17)	Model: SFTC - 760 (107.40)	Model: SFTC - 895 (128.02)	Model: SFTC - 1065 (156.97)	Model:
Rotor Bore – Min	in	Model: SFTC - 320 0.500	Model: SFTC - 375 0.750	Model: SFTC - 450 1.000	Model: SFTC - 525 1.125	Model: SFTC - 630 1.375	Model: SFTC - 760 1.750	Model: SFTC - 895 2.250	Model: SFTC - 1065 2.750	Model:
	(mm)	Model: SFTC - 320 (12.700)	Model: SFTC - 375 (19.050)	Model: SFTC - 450 (25.400)	Model: SFTC - 525 (28.575)	Model: SFTC - 630 (34.925)	Model: SFTC - 760 (44.450)	Model: SFTC - 895 (57.150)	Model: SFTC - 1065 (69.85)	Model:
Rotor Bore – Max	in	Model: SFTC - 320 1.000	Model: SFTC - 375 1.250	Model: SFTC - 450 1.500	Model: SFTC - 525 1.750	Model: SFTC - 630 2.250	Model: SFTC - 760 2.750	Model: SFTC - 895 3.500	Model: SFTC - 1065 4.250	Model:
	(mm)	Model: SFTC - 320 (25.400)	Model: SFTC - 375 (31.750)	Model: SFTC - 450 (38.100)	Model: SFTC - 525 (44.450)	Model: SFTC - 630 (57.150)	Model: SFTC - 760 (69.85)	Model: SFTC - 895 (88.900)	Model: SFTC - 1065 (107.95)	Model:

SFTC Operation:

When current is applied to the coil in the stationary magnet body (held from rotating by an anti-rotation pin), a magnetic field is created which attracts the armature toward the rotor. As the teeth engage, torque is transmitted.

When the current is turned off, the armature slides on the splined output plate adapter. Springs pull on the armature to assist disengagement from the rotor.