MTB Specifications

Order No.	№	Magnetic Pole Size	No. of Magnetic Poles	Magnetic Force (Per Pole) N	Magnetic Force (Overall) kN	Model of Controller	Weight kg	Drawing	Product BOX	CAD	Production	Stock Status
107666	MTB304HD70S	φ70	12	6150	73	ST120F	50	View	Add	DATA	Discontinued	Contact
107667	MTB306HD70S	φ70	18	6150	110	ST120F	70	View	Add	DATA	Discontinued	Contact
107668	MTB308HD70S	φ70	24	6150	147	ST120F	92	View	Add	DATA	Discontinued	Contact
107669	MTB310HD70S	φ70	30	6150	184	ST120F	112	View	Add	DATA	Discontinued	Contact
107670	MTB404HD70S	φ70	16	6150	98	ST120F	62	View	Add	DATA	Discontinued	Contact
107671	MTB406HD70S	φ70	24	6150	147	ST120F	90	View	Add	DATA	Discontinued	Contact
107672	MTB408HD70S	φ70	32	6150	196	ST120F	118	View	Add	DATA	Discontinued	Contact
107673	MTB410HD70S	φ70	40	6150	246	ST200F	142	View	Add	DATA	Discontinued	Contact
107674	MTB504HD70S	φ70	20	6150	123	ST120F	107	View	Add	DATA	Discontinued	Contact
107675	MTB506HD70S	φ70	30	6150	184	ST120F	107	View	Add	DATA	Discontinued	Contact
107676	MTB508HD70S	φ70	40	6150	246	ST200F	140	View	Add	DATA	Discontinued	Contact
107677	MTB510HD70S	φ70	50	6150	307	ST200F	169	View	Add	DATA	Discontinued	Contact
107678	MTB606HD70S	φ70	36	6150	221	ST200F	127	View	Add	DATA	Discontinued	Contact
107679	MTB608HD70S	φ70	48	6150	295	ST200F	165	View	Add	DATA	Discontinued	Contact

Specifi cations and Prices for MTBP

Order No.	№	Magnetic Pole Size	No. of Magnetic Poles	Magnetic Force (Per Pole) N	Magnetic Force (Overall) kN	Model of Controller	Weight kg	Drawing	Product BOX	Production	Stock Status
114997	MTBP500HD70S	φ70	16	6150	98	ST120F	88	View	Add	Discontinued	Contact
114998	MTBP630HD70S	φ70	30	6150	184	ST120F	117	View	Add	Discontinued	Contact

Specifi cations and Prices for MTBR

Order No.	№	Magnetic Pole Size	No. of Magnetic Poles	Magnetic Force (Per Pole) N	Magnetic Force (Overall) kN	Model of Controller	Weight kg	Drawing	Product BOX	Production	Stock Status
120146	MTBR500HD70S	φ70	16	6150	98	ST120F	69	View	Add	Discontinued	Contact
120147	MTBR630HD70S	φ70	32	6150	196	ST120F	109	View	Add	Discontinued	Contact

Other info

Strong Adsorption Forces 6150N,

… but least chips on work-surfaces（per pole of dia.70mm under Max conditions）

Cutting thrust on milling is not in the same directions, so need strong adsorption force.
Each magnetic pole contains strong neodymium magnets to generate strong force.
As Magnetism fl ows from N pole to S pole within workpiece, least chips on workpieces.

Operating Effi ciency Improvement

Manual jigs need tool operations, but magnetic chuck only push the buttons

Process integrations

No interference on cutting tools being clamped from the bottom.

Operating procedure (easy operation) Only push buttons and connectors detachable.

Custom Made, MTB Chuck

Sometimes, Standard Magnetic chucks can not be placed on machine table due to irregular table shape.
Custom made magnetic chuck can be manufactured for such kind of customers.

【e.g.】

Standard MTB506HD70

Custom Made MTB506HD70

 

Examples for custom made MTB chucks
①Change the pitch of magnetic poles.
②Change the outside dimensions.
③Delete clamping grooves on both sides.
There can be some restrictions on making custom made chucks.

Notes

Adsorption force of magnetic chuck can be changed depending on various kind of conditions.
Before using, please check and concider whether this item can be used well or not for your purpose.

①Conditions concerned adsorption force Magnetic fl ux density

Amount of magnetic flux being passed through workpiece decide the adsorption force, which means that as much as magnetic fl ux must be taken into workpiece. In case of general clamping, it is important to set properly on N and S pole to get magnetic fl ux as much as possible. (drawing 1)

 

②Conditions regarding adsorption force Contacting area

If contacting areas become double, amount of magnetic fl ux and clamping force also come to be double (drawing 2). and continuous contact surfaces become bigger, then adsorption forces beome higher. (drawing 3)

 

③Conditions regarding adsorption force Height of raising block

Higher raising block means less amount of magnetic flux through workpiece. Need to check attenuation rate (drawing 4)

 

④Conditions regarding adsorption force Material of workpieces

Materials of workpiece, and jig plates must be checked on its attenuation rate (drawing 5)

 

⑤Conditions regarding adsorption force Surface condtions of workpieces

Adsorption force per unit area can be changed depend on surface conditions of workpiece, and jig plate, which must be checked beofore using. (drawing 6)

 

⑥Conditions regarding the adsorption force Recommended workpiece sizes

Magnetic fl ux in workpiece fl ows from the center of one pole to other one with. drawing semicircle shape. In case that thickness of  workpiece is less than semicircle, magnetic flux flows out of workpiece , which will be led to less adsorption force. Workpiece must have more than minimum dimensions. and be put on 4 poles at least.(drawing 7) Recommended size of workpiece. No. Length × Width × Thickness MTB-HD70 166×166×19 or over

 

⑦Conditions regarding the adsorption force Calculation of clamping force

 【Calculation of adsorption forces】 （Workpiece size: 320 x320 x 35 Casting(FC250)）

  

⑧Conditions regarding machining Directions of cutting thrust

In case that directions of cutting thrust is horizontal to adsorption face, Adsorption force against cutting thrust need approx.. 3-10 times.(coefficient frictions is 0.1-0.3). If not enough holding force, need to set stopper to that directions of cutting thrust(drawing 8)

 

⑨Conditions regarding remained magnetism Use of demagnetizer

Workpieces after heat treatment can keep remained magnetism Not so easy to release it. Need to remove magnetism by demagnetizer.

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