FAQ

What is the specification of the broach?

The broach we produce is followed the standard of DIN 1417 (Deutsehe Industrie Normen).

Which model of broaching machine shall I buy?

The broaching machine and tools are made specially as per your products. Please provide before and after broaching drawings for evaluation.

What is the lead time?

It depends on size and how complicated the broaching machine is. Normally, it takes 45 to 75 days to completed a machine under 8 ton. For bigger or more complicated machines, it might take 60 to 180 days.

Can broaching be applied to any hardness?

Tool life is good when hardness of the product is under HRC 25. When hardness is above HRC 25, tool life will be reduced significantly. Broaching is not recommanded if the hardness is more than HRC 32.

Is it possible to clean the broach tool automatically?

Yes. The auto tool cleaning device is designed according to the shape of the broach tool.

In addition to broaching machines, do you supply jigs and broach tools?

Yes. We supply broaching machine, jigs, & broach tools as a turn key solution.

How to adjust broaching speed?

In hydraulic broaching machines, adjust the flow control valve.In servo table-up broaching machines, set speed in the Human-machine interface.

Can I use one puller for all different broaches?

No. One puller is for one shank size only. However, if you really need this, we could provide customized design.

There are many teeth on the broach. Are all the teeth same?

Actually they are not same. There are rough teeth, semi-finishing teeth, & finishing teeth which play different roles in broaching process.

What are the advantages of electromechanical table-up broaching machines?

Servo drive table-up broaching machines are easy to operate, space saving, energy saving, and stylish.

What is the controller on the electromechanical broaching machines?

It is Mitsubishi human-machine interface.

What is the control system of the CNC helical broaching machines?

The standard accessory is SYNTEC PC-Based controller with Yaskawa servo system. The FANUC CNC control system is optional.

What is the control interface of electromechanical table-up broaching machines?

The graphical human-machine interface developed by Axisco team.

How to adjust the broaching speed of hydraulic broaching machines?

Adjust the flow control valve for stepless speed change. When the digits is set to small value, the speed is faster. And vice versa.

How to collect and clean the iron chips?

The chip drawer is standard accessory of the machine. The auto chip conveyor is optional.

Why is the coolant sprayed without pressure?

In broaching, the amount of coolant is much more important than the pressure.

Which coolant shall I choose, oil or water?

It depends on your requirement. Generally speaking, the cooling efficiency of oil-based coolant is better than water. It is helpful for product quality and broach tool life.

What is the voltage of the machine?

The standard voltage is 3 phase, 220 V, 60 Hz. The voltage can be customized as per customer’s requirements.

How do you fit the height of the broaching machine into container?

We will put the machine horizontally during packing. Therefore, it can be put into normal container.

The working table of the hydraulic broaching machine is high, how do I operate?

You can stand on stairs to operate. Or dig a hole to put the broaching machine into it for stand-on-ground operation.

The ceiling of my factory is not high enough, what kind of broaching machine shall I buy?

Servo drive table-up broaching machine is the best choice. The height is reduced significantly if you compare with hydraulic broaching machines.

How are the guide rails lubricated?

There is auto lubricator on every broaching machines.

In hydraulic broaching machines, how to cool down the hydraulic oil?

3 ton – natural cool down process. 5 to 15 ton – cooling fan. 20 ton and above – oil chiller.

Some broach tools are long and heavy. If there is no crane in the factory, how to change tools from the machine?

A small hoist on the machine could be customized according to customer’s requirements (it is optional).

What is the major power source in broaching machines?

In hydraulic broaching machines, the source is hydraulic power. In electromechanical broaching machines, the source is electric power.

What is an auto broach lifter?

It is used in internal broaching. The function is to lift up the broach tool for operators to load the work piece.

What is an auto tool cleaning device?

It is a mechanism which cleans the tool during the return process.

Comparing a vertical broaching machine to a horizontal broaching machine, which is better?

The vertical broaching process takes advantage from gravity, while horizontal broaching process is interfered by gravity. In general, a vertical broaching machine is more precise than horizontal one.

Why is the vertical broaching machine so high?

It is majorly because of the broach tools are much longer than other kinds of tools. If height is your major concern, the table up broaching machines (which the work piece moves) are shorter than pull down broaching machines (which the tool moves).

In hydraulic broaching machine, how to prevent the puller from falling down when the machine is idle?

There is a counter pressure which is designed for supporting the puller all the time.

How often shall I change hydraulic oil?

If you work in 1 shift (7 – 8 hrs. per day), please change once a year. If you work in 3 shifts (22 – 24 hours per day), please change once per three months.

How to clean hydraulic oil tank?

There is a big maintenance hole on the side of the tank.

What is the safe pressure range of your hydraulic broaching machines?

The initial setting is 50 kg/cm2 and shall not exceed 60 kg/cm2 during broaching process.

How to calculate the life of the broach tools?

There is a counter on the machine to calculate life of a single tool. When the machine is equipped with Human-machine interface (HMI), life of different tools can be managed together.

How to adjust the total pressure limit?

Rotate clockwise to increase, rotate counter-clockwise to decrease.

Would the puller slide fall down due to its weight?

No. There is counter balance pressure to support the puller slide.

In auto puller, what to do if the jaws are not opened?

Adjust the position of the origin, let the puller cover be pressed within suitable range. So that the jaws could be opened by the pressed spring.

In hydraulic puller, what to do if the jaws are not opened?

Check if there are any problems in the electrical and hydraulic circuit of the puller.

What is the function of the rough teeth on a broach?

With more cutting amount, the material is removed faster.

What is the function of the semi-finishing teeth?

With fewer cutting amount, the required dimension is approached gradually.

What is the function of the finishing teeth?

With very few or almost no cutting amount, the precision and surface finish of the process is finalized.

There are several teeth broken on my broach (they are not in line), is it still OK?

If the broken teeth are not for finishing, it is OK.

There are two teeth broken on my broach (they are continuous teeth in broaching path), is it still OK?

It is not OK. The next teeth will all be broken in a short time because there will be too much load on them.

What is the brand of motors in your hydraulic broaching machines?

TECO or TATUNG. They are the most famous Taiwanese motor brands.

Where do your hydraulic parts come from?

All come from the top suppliers in Taiwan.

How do you make the machine body, welding or casting?

Welding. It provides lots of flexibility for customized requirements.

How to ensure the quality of welding body?

The whole welding process is done and controlled in house. After welding there will be tempering process for stress relieving.

Is it difficult to operate a broaching machine?

It is quite simple. With Axisco’s solution which includes machines, tools, and jigs, the user only have to press a bottom to produce high quality products.

How often shall the coolant be replaced?

It depends on coolant condition. The coolant shall be changed when there is color change, bad smell, or other bad condition.

In winter morning, the hydraulic broaching machine become “lazy”, why?

The efficiency of hydraulic system is influenced by oil temperature. Please run empty cycles on the machine for some time to raise the oil temperature.

There is a burr at puller surface, I can’t put the broach tool into it.

Please use a sand paper or hand polisher to clear the burr. The precision of the puller will remain same.

What is the standard safety accessory on hydraulic broaching machines?

Both-hand start bottoms. Other safety accessories are optional.

What is the standard safety accessories on electromechanical table up broaching machines?

They are built as per CE standard.

What is the lead time for broaches?

It depends on how difficult to make the tools. It is 45 – 75 days in general, but it could be longer for bigger or complicated tools.

Why do the broaches take almost same lead time as the broaching machines?

It requires many process to make good broaches. Each process has to take enough time for keeping quality.

Is there any poka-yoke for loading?

It is optional. We can make poka-yoke as per customer’s requirements.

After broaching, if the work piece was not removed, the tool might hit the work piece during its return. How to prevent it?

The work piece sensor is included in standard accessories. If the work piece wasn’t removed after broaching, the machine will not run the return process.

Can we broach full outer diameter in surface broaching? Like the shape of gear?

Generally not. The work piece has to be well clamped during surface broaching. Therefore, the angle of broaching is better within 180 degree.

What is keyway broaching jig, a.k.a. “tool holder”?

It is made as per hole diameter and broach tool size. The broach is stably held for one-side cutting.

Can we integrate the rotary table on the broaching machine?

It is made as per hole diameter and broach tool size. The broach is stably held for one-side cutting.

How many days does it take to learn how to operate and maintain the broaching machine?

Yes. The rotary table is used for reducing loading / unloading time to few seconds. It makes the broaching machine work in better efficiency.

Can I do broaching in blind holes?

No. Broaching is for through holes only.