STF Models

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STF Models Specifications

STF Models

STF Models

[Specifications]

Model	Torque		Misalignment			Max. rotation speed ［min^-1］	Torsional stiffness ［N・m/rad］	Moment of inertia ［kg・m²］	Mass ［kg］
Model	Nominal ［N・m］	Max. ［mm］	Parallel ［mm］	Angular ［°］	Axial ［mm］	Max. rotation speed ［min^-1］	Torsional stiffness ［N・m/rad］	Moment of inertia ［kg・m²］	Mass ［kg］
STF-013SA1	0.5	1	0.15	1.5	±0.2	10000	15	0.11×10^-6	0.004
STF-016SA1	1	2	0.15	1.5	±0.2	10000	27	0.31×10^-6	0.009
STF-019SA1	1.5	3	0.15	1.5	±0.2	10000	38	0.70×10^-6	0.013
STF-024SA1	2.5	5	0.15	1.5	±0.2	10000	127	1.89×10^-6	0.023
STF-029SA1	4	8	0.2	1.5	±0.3	10000	201	4.40×10^-6	0.034
STF-034SA1	6	12	0.2	1.5	±0.3	10000	371	9.77×10^-6	0.056
STF-039SA1	8.5	17	0.2	1.5	±0.3	10000	485	21.13×10^-6	0.091
STF-044SA1	15	30	0.2	1.5	±0.3	10000	996	37.34×10^-6	0.12
STF-056SA1	30	60	0.2	1.5	±0.3	10000	2075	125.5×10^-6	0.251

*Check the Max. Torque for the Shaft Diameter list as there may be limitations on the standard and maximum torque caused by the holding power of the coupling shaft section.

*The max. rotation speed values do not take into account dynamic balance.

*The static torsional stiff ness values are analysis values for the element taken at a temperature of 20°C at maximum bore diameter.

*The moment of inertia and mass are measured for the maximum bore diameter.

[Dimensions]

Model	d1, d2[mm]		D[mm]	L[mm]	LF[mm]	S[mm]	A[mm]	C[mm]	M Quantity-Nominal dia.	Tightening torque [N･m]
Model	Min.	Max.	D[mm]	L[mm]	LF[mm]	S[mm]	A[mm]	C[mm]	M Quantity-Nominal dia.	Tightening torque [N･m]
STF-013SA1	3	5	13	18	6	6	3.9	2	1-M1.6	0.23～0.28
STF-016SA1	3	6	16	22	7.5	7	4.8	2.5	1-M2	0.4～0.5
STF-019SA1	3	8	19	25	9	7	5.8(6)	3.15	1-M2.5(M2)	1.0～1.1(0.4~0.5)
STF-024SA1	5	10	24	27	9	9	8.7	3.15	1-M2.5	1.0～1.1
STF-029SA1	5	14	29	30	10	10	11	3.3	1-M2.5	1.0～1.1
STF-034SA1	5	16	34	34	12	10	12.5	3.75	1-M3	1.5～1.9
STF-039SA1	6	19	39	41	15.5	10	14	4.5	1-M4	3.4～4.1
STF-044SA1	8	24	44	48	15.5	17	17	4.5	1-M4	3.4～4.1
STF-056SA1	8	30	56	60	20.5	19	22	6	1-M5	7.0～8.5

*The nominal diameter for the clamp bolt M is equal to the quantity - the nominal diameter of the screw, where the quantity is for a hub on one side.

*The values in ( ) of the STF-019, d1 or d2 is the value in the case of ø8mm.

*The escape in the internal diameter of the element is equal to dimension d2 (large diameter) plus ø0.9 mm.

* The rated dimension tolerance for countershafts is h7 class.

[Standard bore diameter]

Model	Standard bore diameter d1, d2 ［mm］
Model	3	4	5	6	6.35	7	8	9	9.525	10	11	12	13	14	15	16	17	18	19	20	22	24	25	28	30
STF-013SA1	●	●	●
STF-016SA1	●	●	●	●
STF-019SA1	●	●	●	●	●	●	●
STF-024SA1			●	●	●	●	●	●	●	●
STF-029SA1			●	●	●	●	●	●	●	●	●	●	●	●
STF-034SA1			●	●	●	●	●	●	●	●	●	●	●	●	●	●
STF-039SA1				●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●
STF-044SA1							●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●
STF-056SA1							●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●

*The bore diameters in the boxes marked by [●] are used as standard bore diameters.

*Check the table for information on max. torque for the shaft diameter as there may be limitations on the standard and maximum torque determined by the holding power of the coupling shaft section depending on the bore diameter used.

[Max. torque for the shaft diameter]

Model	Standard bore diameter[mm] and max. torque for the shaft diameter[N･m]
Model	3	4	5	6	6.35	7	8	9	9.525	10	11	12	13	14	15	16	17	18	19	20	22	24	25	28	30
STF-013SA1	0.10	0.25	0.40
STF-016SA1	0.5	0.6	0.7	0.8
STF-019SA1	0.8	1.2	1.6	1.9	1.9	2.3	0.8
STF-024SA1			1.6	2.1	2.1	2.6	3.3	4.0	4.0	4.7
STF-029SA1			1.8	2.2	2.2	2.7	3.4	4.1	4.1	4.8	5.5	6.3	7.8	8.0
STF-034SA1			2.7	3.0	3.0	3.3	4.0	4.8	4.8	5.6	6.5	7.8	9.0	10.7	12.0	12.0
STF-039SA1				3.4	3.4	4.0	5.0	6.1	6.1	7.1	8.2	9.3	10.4	11.5	12.8	14.0	15.3	16.6	17.0
STF-044SA1							6.0	8.3	8.3	9.8	11.3	12.8	14.3	16.0	17.3	18.8	20.3	21.8	23.5	24.8	27.8	30.0
STF-056SA1							10.7	11.9	11.9	13.4	14.9	16.3	17.8	18.7	20.8	22.2	23.7	25.2	27.0	32.0	41.9	52.0	56.3	60.0	60.0

*Check the this list as there may be limitations on the standard and maximum torque caused by the holding power of the coupling shaft section.

*Standard or maximum torque with a limitation becomes the small diameter (d1) torque value. However, note that only in the instance that d1 or d2 for STF-019SA1 is ø8 mm,there is a decrease in the size of the clamping bolt, and the limit is 0.8 N∙m.

[STF-019SA1 Standard bore diameter and Max. torque]

d1-d2	max. torque [N･m]	d1-d2	max. torque [N･m]	d1-d2	max. torque [N･m]	d1-d2	max. torque [N･m]	d1-d2	max. torque [N･m]	d1-d2	max. torque [N･m]	d1-d2	max. torque [N･m]
3B-3B	0.8	3B-4B	0.8	3B-5B	0.8	3B-6B	0.8	3B-6.35B	0.8	3B-7B	0.8	3B-8B	0.8
		4B-4B	1.2	4B-5B	1.2	4B-6B	1.2	4B-6.35B	1.2	4B-7B	1.2	4B-8B	0.8
				5B-5B	1.6	5B-6B	1.6	5B-6.35B	1.6	5B-7B	1.6	5B-8B	0.8
						6B-6B	1.9	6B-6.35B	1.9	6B-7B	1.9	6B-8B	0.8
								6.35B-6.35B	1.9	6.35B-7B	1.9	6.35B-8B	0.8
										7B-7B	2.3	7B-8B	0.8
												8B-8B	0.8