Specifi cations

Order No.	№	Magnetic pole size	Number of magnetic poles	Adsorption force(per pole) （N）	Adsorption force(tota) (kN)	Controller	Rated current A	Weight (㎏)	Drawing	Product BOX	CAD	Production	Stock Status
135676	MTB304HD70S1	φ70	12	6150	73	NMC-100	6	50	View	Add	DATA	Stock Item	Contact
135677	MTB306HD70S1	φ70	18	6150	110	NMC-100	9.6	72	View	Add	DATA	Stock Item	Contact
135678	MTB308HD70S1	φ70	24	6150	147	NMC-100	11.6	95	View	Add	DATA	×	Stock△
135679	MTB310HD70S1	φ70	30	6150	184	NMC-100	15.2	114	View	Add	DATA	×	Stock△
135680	MTB404HD70S1	φ70	16	6150	98	NMC-100	8.4	64	View	Add	DATA	×	Stock△
135681	MTB406HD70S1	φ70	24	6150	147	NMC-100	10.8	91	View	Add	DATA	×	Stock△
135682	MTB408HD70S1	φ70	32	6150	196	NMC-100	16.4	120	View	Add	DATA	×	Stock△
135683	MTB410HD70S1	φ70	40	6150	246	NMC-200	37.6	145	View	Add	DATA	×	Stock△
135684	MTB504HD70S1	φ70	20	6150	123	NMC-100	9.6	76	View	Add	DATA	×	Contact
135685	MTB506HD70S1	φ70	30	6150	184	NMC-100	15.2	110	View	Add	DATA	×	Stock△
135686	MTB508HD70S1	φ70	40	6150	246	NMC-200	38.4	144	View	Add	DATA	×	Stock△
135687	MTB510HD70S1	φ70	50	6150	307	NMC-200	49.6	173	View	Add	DATA	×	Contact
135688	MTB606HD70S1	φ70	36	6150	221	NMC-200	32.8	128	View	Add	DATA	×	Stock△
135689	MTB608HD70S1	φ70	48	6150	295	NMC-200	43.2	169	View	Add	DATA	×	Stock△

Specifi cations MAGNETIC CHUCK , MAIN BODY　

Order No.	№	Magnetic pole size	Number of magnetic poles	Adsorption force(per pole) (N)	Adsorption force(tota) (kN)	Controller	Weight (㎏)	Drawing	Product BOX	CAD	Production	Stock Status
107698	MTB304HD70	φ70	12	6150	73	NMC-100	50	View	Add	DATA	Stock Item	Contact
107699	MTB306HD70	φ70	18	6150	110	NMC-100	72	View	Add	DATA	Stock Item	Contact
107700	MTB308HD70	φ70	24	6150	147	NMC-100	95	View	Add	DATA	Stock Item	Stock△
107701	MTB310HD70	φ70	30	6150	184	NMC-100	114	View	Add	DATA	Stock Item	Stock〇
107702	MTB404HD70	φ70	16	6150	98	NMC-100	64	View	Add	DATA	Stock Item	Stock△
107703	MTB406HD70	φ70	24	6150	147	NMC-100	91	View	Add	DATA	Stock Item	Stock〇
107704	MTB408HD70	φ70	32	6150	196	NMC-100	120	View	Add	DATA	Stock Item	Stock△
107705	MTB410HD70	φ70	40	6150	246	NMC-200	145	View	Add	DATA	Stock Item	Stock△
107706	MTB504HD70	φ70	20	6150	123	NMC-100	76	View	Add	DATA	Stock Item	Contact
107707	MTB506HD70	φ70	30	6150	184	NMC-100	110	View	Add	DATA	Stock Item	Stock△
107708	MTB508HD70	φ70	40	6150	246	NMC-200	144	View	Add	DATA	Stock Item	Stock△
107709	MTB510HD70	φ70	50	6150	307	NMC-200	173	View	Add	DATA	Stock Item	Contact
107710	MTB606HD70	φ70	36	6150	221	NMC-200	128	View	Add	DATA	Stock Item	Stock△
107711	MTB608HD70	φ70	48	6150	295	NMC-200	169	View	Add	DATA	Stock Item	Stock△

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.