Frequently Asked Questions
What does MMK products have to offer?

Please refer to the product .

I want to purchase MMK products. Who is the contact person?

If you are purchasing in Japan, please refer to our product dealers.
If you purchase outside Japan, please refer to our overseas network.

I want a Special products.

Please contact our sales office (TEL: +81-76-267-3211 ) or use the " Inquiry Form ".

I want to know more about the product specifications.

Please contact our sales office (TEL: +81-76-267-3211 ) or use the " Inquiry Form ".

I want raw jaws, Hard jaws, and T-nuts.

Please refer to the list and the shops that handle our products.
Accessories, stores that handle our products

I would like to know the code numbers of raw jaws, hard jaws and T-nuts that are not listed.

Please confirm the model name and serial number of our product and contact the machine manufacturer, distributor or our sales office (TEL:+81-76-267-3211 ).

The chuck is moving slowly. (or not smooth, stopped moving.) I checked the hydraulic supply and cylinder, but there is no problem. What should I do?

After turning off the hydraulic pressure and power, clean and grease the chuck.

The workpiece was grasped by the chuck, the same process was maintained, and machining was continued, but suddenly one day the workpiece began to slip. What should we do?

After checking the blade, coolant, pressure medium and other conditions, turn off the power and clean and grease the chuck. If the problem persists, the main cause may be an internal leak in the hydraulic (pneumatic) cylinder.

Is there a recommended grease?

For the recommended grease, please click here.

Where should the grease be fed?

Go to grease nipple, please.

How should I feed grease?

Use a commercially available grease gun (clean one) to supply clean grease.

Do you have a recommended grease gun?

Some grease guns on the market have a large diameter and interfere with the grease nipple seat grease. Please use a grease gun that does not interfere (small diameter). Also, we recommend using a lever type with a bite. (MMK power chucks are made with high precision and the gap is small, so the grease pressure will be high. For more information, please click here.

When should grease be applied?

Please supply grease to the mmk power chuck every 8 hours of operation.

How much grease should I feed?

When greasing every 8 hours of operation, the standard is about 1 (cc) per location (= 1 grease nipple). Please increase the grease supply frequency depending on the usage conditions.

I greased up, but I can't tell if the grease was supplied or not. What should I do?

To check, feed a little more grease and make sure it protrudes from the gap between the master jaws. After lubricating, wipe off any grease that has come out. Adding more grease does not affect the performance, but be careful not to turn the machine immediately after greasing, as the grease may scatter.

I cleaned and greased it as described on the website, but it still doesn't work. What should I do?

Please reconfirm the auxiliary equipment, disassemble and clean the chuck, and re-grease it. Please refer to the instruction manual for disassembly and cleaning.

And yet it still won't budge. What should I do?

Please contact our service center (TEL:+81-76-268-4122 ) or " Inquiry Form " for consultation. When contacting us, please provide us with the model name (e.g. ZA6-8-52-31), 5 or 6-digit serial number (e.g. 115350), the model name of the machine to which the chuck is to be installed, and the conditions of use. (The model name and serial number are imprinted on the chuck surface.

The grease nipple was damaged. What should I do?

Please exchange to a new one.

What is the model of the grease nipple? And where can I buy it?

Mainly JIS-A type M6 is adopted. However, some of the large chucks of 12 inches or more may adopt a larger grease nipple. Please contact our service center (TEL:+81-76-268-4122 ) with the model name and serial number of our products. In addition, it is possible to purchase it at the shop which handles our products. Recently, the direct sales website of factory equipment and tools is also increasing its handling. It is one of the ways to purchase our products.

I have lost the instruction manual (or attached tools). What should I do?

Please contact our service center (TEL:+81-76-268-4122 ) or " Inquiry Form " for consultation. When contacting us, please provide us with the model name (e.g. ZA6-8-52-31), 5 or 6-digit serial number (e.g. 115350), the model name of the machine to which the chuck is to be installed, and the conditions of use. (The model name and serial number are imprinted on the chuck surface.

HOW SOON SHOULD I CHANGE THE LUBRICANT FOR NC ROTARY TABLES? ALSO, IS THERE A RECOMMENDED LUBRICANT?

THE STANDARD IS ONCE EVERY 6 MONTHS, ALTHOUGH IT MAY VARY DEPENDING ON THE USAGE CONDITIONS OF EACH CUSTOMER. FOR THE RECOMMENDED LUBRICANT, PLEASE REFER TO THE STICKER OR NAMEPLATE ATTACHED TO THE NC ROTARY TABLE OR THE INSTRUCTION MANUAL.

WE DECIDED TO USE THE NC CIRCULAR TABLE AGAIN, WHICH HAD NOT BEEN USED FOR OVER A YEAR. WHAT SHOULD WE PAY ATTENTION TO?

Replace the lubricating oil with a new one and run the machine for about one hour at low speed.

THE NC ROTARY TABLE HAS BEEN IMPACTED (HIT WITH A BLADE, ETC.). IT DOES NOT MOVE (DOES NOT ROTATE). WHAT SHOULD I DO?

Damage to the worm wheel is possible. Please contact our service center (TEL: +81-76-268-4122 ) or " Inquiry Form " for consultation. When consulting with us, please provide the model name (chuck example: ZA6-8-52-31), 5-digit or 6-digit serial number (example: 115350), the model name of the machine to be installed, and the usage conditions.

THE NC ROTARY TABLE HAS BEEN IMPACTED (HIT WITH A BLADE, ETC.). IT MOVES (ROTATES), WHAT SHOULD I DO?

First, check that there are no dangerous failure parts including the machine and equipment, and then remove the jig, etc. while paying sufficient attention to safety, and check that there is no abnormal noise or abnormal vibration in the NC Rotary Table. If any abnormal noise is generated, please contact our service center (TEL: +81-76-268-4122 ).
Check the servo motor load of the NC Rotary Table. If the load continues to be high, or if the load is high all over the circumference, please contact our service center (TEL: +81-76-268-4122 ).
Measure the various accuracies of NC Rotary Tables (runout of rotating surface in radial direction, runout of rotating surface in end-face direction, etc.) within the possible range, and compare with the data of Completion Inspection Report (attached to all NC Rotary Tables when they are new). If any abnormality is found, please contact our service center (TEL: +81-76-268-4122 ).

THE BRAKE CLAMP CONFIRMATION SIGNAL OF THE NC CIRCULAR TABLE (MAINLY LS51/LS52) IS NOT RECOGNIZED.

Check that the clamp/unclamp confirming device is operating normally. If it is working properly, the proximity switch may be faulty. If the clamp/unclamp confirmation device does not work on a model equipped with an air booster, bleed the air from the air booster.

AIR BLEEDING WORK OF NC CIRCULAR TABLE, HOW IS IT DONE?

Refer to the Operation Manual 8. Operation Preparation.

Air venting
The NC Rotary Tables are shipped with as little air as possible inside. However, air may get mixed in depending on the condition of the connection to the hydraulic supply port for the table clamp and the piping and hose from the hydraulic unit. However, depending on the condition of the piping and hose from the hydraulic unit, air may be mixed in. Please fill the piping and hose with oil beforehand and connect them quickly.
Set the pressure to low (2Mpa (about 20kgf/cm)) and repeat clamping and unclamping 2 to 3 times, then cover the air vent with a rag to prevent oil from spouting out and loosen the air vent slightly for about 2 to 3 seconds. (If the pipe line from the hydraulic unit is long or there is a lot of air mixed in the pipe line, it is necessary to allow 5 to 6 seconds or more.

Repeat this process several times (about 2 to 3 times).
In addition to the air vent, it is also effective to vent the air at the joint of the hose and piping for the purpose of venting the air in the hydraulic pipeline.

THE TABLE DOES NOT STOP EVEN IF THE NC CIRCULAR TABLE IS RETURNED TO THE ORIGIN.

Please check the proximity switch for originating.

THE BRAKE GRIPPING FORCE OF THE NC ROTARY TABLE HAS DECREASED. WHAT SHOULD WE DO?

Please check if the various media (power supply, hydraulic pressure, air) are supplied properly. Contamination of the lubricant affects the brake gripping force. Please replace with clean lubricant. The part number and the amount used are indicated on the nameplate of the product. If the display is hidden by the cover of the machine tool, please contact our service center (TEL:+81-76-268-4122 ) with the model name and serial number of the product.

I replaced the lubricating oil, but the brake gripping force has not returned. What should I do?

Brake replacement is recommended.

I want to select a face driver or a live center. Which one should I choose? I am not sure.

Please contact our sales office (TEL : +81-76-267-3211 FAX : 076-268-5279) for instructions. In that case, please tell us the possible range. In addition to the work piece and processing contents, please tell us the maximum thrust of the tailstock and the morse taper nomination.

I want to know the seals of the hydraulic cylinder.

Please contact our service center (TEL: +81-76-268-4122 ) with the model name and serial number of our product.

I WANT TO REPAIR MY MMK PRODUCT.

Please ask the manufacturer or dealer of the machine you purchased the product from for the status along with the model name and serial number of the product.

I would like to repair it, but I am considering replacing it with a new one depending on the cost and the accuracy after repair.

We will be able to provide you with a repair estimate after checking your returned product and its current condition.

After reviewing the repair estimate, it was decided to replace the unit with a new one instead of repairing it. What will be the cost of preparing the repair estimate?

Please contact our sales office and discuss your needs.

After looking at the repair estimate, it was decided to discard the unit instead of repairing it. There is no plan to replace it with a new one. Will there be a cost?

Depending on the situation, we will charge for the service. Please consult with our sales office for details.

I want to return the product for repair, but the box is missing. What should I do?

We can send you the box and packing materials in advance. Please let us know.

I want to return it for repair, but I don't know which company handles heavy items. What should I do?

Please instruct us. We will introduce the carrier to you.

When returning a product for repair, is the freight charge to Matsumoto Machine prepaid or cash on delivery? Cash on delivery?

Except in special cases, prepayment is basically required.

After repair is completed, is the freight shipped from Matsumoto Machine prepaid or cash on delivery? Cash on delivery?

Except in special cases, prepayment is basically required.