Basic size of mm

d	280
D	500
B	130

The basic rated load is kN

trends C	2200
static state Co	3250

Fatigue load limit Pu	285

Rated rotation speed is r/min

Refer to the speed	1200
limit speed	1900

quality	115
model	NU2256ECMA

Dimensions are mm

d	280
d1 ～	350
D1 ～	433
F,E	327
r1,2 min	5
r3,4 min	5
s1)	10.2

Shoulder gear and chamfer size mm

da min	300
Da max	320
db,Da min	331
Da max	480
ra max	4
rb max	4

Calculation coefficient

kr	0.2

Corner circle

model	HJ2256EC
quality	6.75
Size B1	18
Size B2	38