THK BNF/ BIF Pricision Ball Screw

Model No.	Screw shaft OD d	Lead l	Ball center-to- center diameter dp	Thread minor diameter d3	No. of loaded circuits/ Rows×turns	Basic load rating		Note) 1 Rigidity K N /μm
Model No.	Screw shaft OD d	Lead l	Ball center-to- center diameter dp	Thread minor diameter d3	No. of loaded circuits/ Rows×turns	Ca kN	C0a kN	Note) 1 Rigidity K N /μm
BNFN 5520-5	55	20	57.7	47.9	2×2.5	138.2	403.8	2550
BNFN 6310-2.5	63	10	64.75	57.7	1×2.5	35.4	111.7	1090
BNFN 6310-5			64.75	57.7	2×2.5	64.2	222.5	2100
BNFN 6310-7.5			64.75	57.7	3×2.5	90.9	334.2	3090
BNFN 6312A-2.5		12	65.25	56.3	1×2.5	48.1	139.2	1120
BNFN 6312A-5		12	65.25	56.3	2×2.5	87.4	278.3	2160
BNFN 6316-2.5		16	65.7	55.9	1×2.5	81.1	231.3	1470
BNFN 6316-5		16	65.7	55.9	2×2.5	147.0	462.6	2840
BNFN 6320-2.5		20	65.7	55.9	1×2.5	81.0	231.3	1470
BNFN 6320-5		20	65.7	55.9	2×2.5	147.0	463.5	2640
BNFN 7010-2.5	70	10	71.75	64.5	1×2.5	36.8	123.5	1180
BNFN 7010-5			71.75	64.5	2×2.5	66.9	247.0	2280
BNFN 7010-7.5			71.75	64.5	3×2.5	94.9	371.4	3350
BNFN 7012-2.5		12	72.0	64.2	1×2.5	43.5	139.2	1200
BNFN 7012-5			72.0	64.2	2×2.5	78.9	278.3	2320
BNFN 7012-7.5			72.0	64.2	3×2.5	111.7	417.5	3420
BNFN 7020-5		20	72.7	62.9	2×2.5	153.9	514.5	3090
BNFN 8010-2.5	80	10	81.75	75.2	1×2.5	38.9	141.1	1300
BNFN 8010-5			81.75	75.2	2×2.5	70.6	283.2	2530
BNFN 8010-7.5			81.75	75.2	3×2.5	100.0	424.3	3720

Model No.	Nut dimensions									Screw-shaft inertial moment per mm kg‧cm²/mm
Model No.	OD	Flange diameter D1	Overall length L	H	B1	B2	PCD	d1×d2×h	Oiling port A	Screw-shaft inertial moment per mm kg‧cm²/mm
BNFN 5520-5	112	158	347	28	319	-	134	14×20×13	PT1/8	7.05×10^-2
BNFN 6310-2.5	108	154	137	22	115	-	130	14×20×13	PT1/8	1.21×10^-1
BNFN 6310-5	108	154	197	22	175	-	130	14×20×13	PT1/8	1.21×10^-1
BNFN 6310-7.5	108	154	257	22	235	-	130	14×20×13	PT1/8	1.21×10^-1
BNFN 6312A-2.5	115	161	159	22	137	-	137	14×20×13	PT1/8	1.21×10^-1
BNFN 6312A-5	115	161	231	22	209	-	137	14×20×13	PT1/8	1.21×10^-1
BNFN 6316-2.5	122	184	208	24	184	-	152	18×26×17.5	PT1/8	1.21×10^-1
BNFN 6316-5	122	184	304	24	280	-	152	18×26×17.5	PT1/8	1.21×10^-1
BNFN 6320-2.5	122	180	227	28	199	-	150	18×26×17.5	PT1/8	1.21×10^-1
BNFN 6320-5	122	180	347	28	319	-	150	18×26×17.5	PT1/8	1.21×10^-1
BNFN 7010-2.5	125	167	141	18	123	-	145	11×17.5×11	PT1/8	1.85×10^-1
BNFN 7010-5	125	167	201	18	183	-	145	11×17.5×11	PT1/8	1.85×10^-1
BNFN 7010-7.5	125	167	261	18	243	-	145	11×17.5×11	PT1/8	1.85×10^-1
BNFN 7012-2.5	128	170	165	18	147	-	148	11×17.5×11	PT1/8	1.85×10^-1
BNFN 7012-5	128	170	237	18	219	-	148	11×17.5×11	PT1/8	1.85×10^-1
NFN 7012-7.5	128	170	309	18	291	-	148	11×17.5×11	PT1/8	1.85×10^-1
BNFN 7020-5	130	186	325	28	297	-	158	18×26×17.5	PT1/8	1.85×10^-1
BNFN 8010-2.5	130	176	137	22	115	-	152	14×20×13	PT1/8	3.16×10^-1
BNFN 8010-5	130	176	197	22	175	-	152	14×20×13	PT1/8	3.16×10^-1
BNFN 8010-7.5	130	176	257	22	235	-	152	14×20×13	PT1/8	3.16×10^-1

Model No.	Screw shaft OD d	Lead l	Ball center-to- center diameter dp	Thread minor diameter d3	No. of loaded circuits/ Rows×turns	Basic load rating		Note) 1 Rigidity K N /μm
Model No.	Screw shaft OD d	Lead l	Ball center-to- center diameter dp	Thread minor diameter d3	No. of loaded circuits/ Rows×turns	Ca kN	C0a kN	Note) 1 Rigidity K N /μm
BNFN 8012-5	80	12	82.3	74.1	2×2.5	96.5	353.8	2620
BNFN 8020A-2.5		20	82.7	72.9	1×2.5	90.1	294.0	1770
BNFN 8020A-5		20	82.7	72.9	2×2.5	163.7	589.0	3430
BNFN 10020A-2.5	100	20	102.7	92.9	1×2.5	99.0	368.5	2110
BNFN 10020A-5			102.7	92.9	2×2.5	179.3	737.0	4080
BNFN 10020A-7.5			102.7	92.9	3×2.5	253.8	1105.4	6010

Model No.	Nut dimensions									Screw-shaft inertial moment per mm kg‧cm²/mm
Model No.	OD	Flange diameter D1	Overall length L	H	B1	B2	PCD	d1×d2×h	Oiling port A	Screw-shaft inertial moment per mm kg‧cm²/mm
BNFN 8012-5	135	181	231	22	209	-	157	14×20×13	PT1/8	3.16×10^-1
BNFN 8020A-2.5	143	204	227	28	199	-	172	18×26×17.5	PT1/8	3.16×10^-1
BNFN 8020A-5	143	204	347	28	319	-	172	18×26×17.5	PT1/8	3.16×10^-1
BNFN 10020A-2.5	170	243	231	32	199	-	205	22×32×21.5	PT1/8	7.71×10^-1
BNFN 10020A-5	170	243	351	32	319	-	205	22×32×21.5	PT1/8	7.71×10^-1
BNFN 10020A-7.5	170	243	471	32	439	-	205	22×32×21.5	PT1/8	7.71×10^-1

1kN≒102kgf