BS-MODEL

NAKANE Live Center Bevel TYPE BS-MODEL

MT. No2, No3, No4, No5, No6
This center has been developed for a wide range of use in highly accurate heavy-duty cutting by incorporating the features and accuracy of the standard type into this new bevel type through engineering alterations.

The bevel center itself is made into a bearing.

This center is optimally suitable for precision machining.

It features the high accuracy which was unattainable in the conventional center. The center runout is maintained at less than 0.003 mm.

This center is suited for the workpiece having the configuration of a pipe and ring. High-speed and heavy-duty cutting can be completed without any interruption.

The interior of the conical section is fully enclosed to prevent the intrusion of the chips, dirts, rubber and foreign matter.
FOR HIGH SPEED AND HEAVY-DUTY CUTTING


Dimensions		(Unit:mm)								Wt.
Model	(MT)	A	B	C	L	M	D	d	?ПМ/a>	(kg)
BS No.2	2	32.5	19.5	69	121	4.5	70	20	75°	0.83
BS No.3	3	42	19.5	85.5	148.5	5	84	20	75°	1.46
BS No.3B	3	61	22	85.5	168.5	5	119	26	75°	3.31
BS No.4	4	61	22	108.5	191.5	6	119	26	75°	3.61
BS No.4B	4	78	31	108.5	217.5	6	158	39	75°	8.16
BS No.5	5	78	31	139	248	8	158	39	75°	9.02
BS No.5B	5	110	35	139	284	8	216	47.5	75°	19.13
BS No.6	6	110	35	192	337	9.5	216	47.5	75°	20.18

Advantages

Accuracy

The ccnter runout of 0.02 to 0.03 mm in the conventional center has been improved to a maximum of 0.003 mm, as in the case of the standard type. This improvement permits the center to be used in precision machining which could not be done by the conventional bevel type center. The accuracy of workpieces has been improved with beautifully machined surfaces.

Configuration

The bevel conter itself is designed as a bearing, and the tapered section is designed to have a large size without the utilization of inner and outer races. This design considerably increases the durability against the load.

Construction

The oil seal is used at the contact section of the tapered shaft while the O-ring is used at the tip end of the conical and enclosed sections of the cap. Since they are fully enclosed, it is possible to prevent the oil leakage or the intrusion of the dust, coolant and chips from the outside.

Machining

SuJ2 (bearing steel) is used for the conical section and tapered section. It is treated to have the same hardness as the bearing (Rockwell hardness of C60?K to 63?K), and is precision machined.

Maintenance

The use of the special grease minimizes consumption and eliminates the need for replenishment.

Use

This center is effetively used to cut the thin or cylindrical workpieces in addition to pipeshaped workpieces. It permits uninterrupted operation by using the special jig.

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