ER NUT (High accuracy ER milling chuck series) 1 ER nut material:42CrMo 2 Hardness:52HRC 3 Accuracy:AA grade (0.005)mm 4Mill

  A Hexagon ER NUT for ER collet chuck

1Specification 

Type	Model No.	D	L	T
A	ER8A	13.5	11	M10×0.75P
	ER11A	19	11.3	M14×0.75P
	ER16A	28	17.5	M22×1.5P
	ER20A	34	19	M25×1.5P
M	ER8M	12	11	M10×0.75P
	ER11M	16	12	M13×0.75P
	ER16M	22	18	M19×1.0P
	ER20M	28	19	M24×1.0P
	ER25M	35	20	M30×1.0P
UM/RD	ER16UM	32	17	M22×1.5P
	ER20UM	35	19	M25×1.5P
	ER25UM	42	20	M32×1.5P
	ER32UM	50	22.5	M40×1.5P
	ER40UM	63	25.5	M50×1.5P
	ER50UM	78	35.5	M64×2.0P
KM/RD	ER25KM	42	22.5	M32×1.5P
	ER32KM	50	26	M40×1.5P
	ER40KM	63	29	M50×1.5P
	ER50KM	78	40	M64×2.0P

Type	Model No.	D	L	T
MR	ER11MR	16	11.3	M13×0.75P
	ER16MR	22	17	M19×1.0P
	ER20MR	28	19	M24×1.0P
	ER25MR	35	23	M30×1.0P
Invisible(K)
	KER11A	-	6	M18×1.0P
	KER11B	-	9	M18×1.0P
	KER16A	-	8	M24×1.0P
	KER16B	-	12	M24×1.0P
	KER20A	-	11	M28×1.5P
	KER20B	-	13	M28×1.5P
	KER25A	-	12.5	M32×1.5P
	KER25B	-	16.5	M32×1.5P
	KER32A	-	14	M40×1.5P
	KER32B	-	19	M40×1.5P
	KER40	-	17	M50×1.5P

2 Feature

1.Mini clamping nuts are recommended for use where minimal external diameters are important2.Made to ISO9001/ISO140013.Rounded thread start prevents damaging of collets on tool changes4.Balanced by design for high speed machining.5.Collet locking feature to keep the collet from coming out during assembly. 

3 Detailed ER nuts Shows

Mini ER Nut                                             Mini ER nut structure

4 Cotact: