Could Someone Explain Me One Note on the Drawing

Agreed.

...apart from the angle.

If it were made of wood, it would be a single swipe at that angle with a no.3 smoothing plane and follow it up with a quick rub with M2 glasspaper.

Hi PWSlack,

thanks for your reply,

This part will be make of Stainless steel material, and it's measured in INCH ( not mm )

Depends on what "note 01" says.

And the angle is only 30 degrees....

I see no reference to a .12x45° chamfer.

Is see a horizontal surface transitioning to a 30° angle by use of a .12 radius.

PW accomplishes this in #3, by hand. If it were metal, a file could be used.

Hello LYN,

Thank you very much,

We see a horizontal surface transitioning to a 30°angle ,

This drawing is in INCH ( not mm ), and we'll machine this part with CNC lathe

and please don't laugh for my question : "PW accomplishes this in #3, by hand", PW means abrasive paper / glass paper / sandpaper right?

I hope your help further, Thank you

You need an outside radius of .12 inch that transitions from the horizontal surface into the 30° angle.

This can be programmed into the CNC and should present no problems.

An experienced machinist could do this with a flat file, if the tolerances are not too tight.

I can't tell, but I suspect the 0.12R is from the 30° surface to the vertical surface. At least, it would make sense in that location.

It appears to me that the note arrow points to the transition from horizontal to angle, not angle to vertical.

First thing that came to my mind upon reading this question was: What's the unit of measurement being used on the machine drawing? mm, or Inches?

The OP needs to go have a "little talk" with the company's Drafting Dept. or the Supervising Engineer and ask for some clarification before machining the part......

This information would be in the title bolck, somewhere. No sense in repeating it on every dimension.

Hello CaptMoosie,

Thank you very much,

Yes, this is my lack. I need to say more: The unit of measurement is Inches, not mm

and I think I should ask you prior go have a "little talk" with the company's Drafting Dept. or the Supervising Engineer ...

I hope you help me further , thank you very much

The radius is a rounding of the junction of the horizontal surface with the 30° chamfer surface.

Dear All,

First, I'd like to say "thank you" to you,

I need to say more infomation: The measurement is in INCHES , the material of this part is stainless steel, and we'll machine it with CNC lathe

I agree : "The radius is a rounding of the junction of the horizontal surface with the 30° chamfer surface."

After reading your reply, I've just realized that: Due to the size of this part is too big as compare with the size of the drawing ( A4 landscape ) so we will not able to see the corner radius. Thus they' made the arrow and note at that location to clarify it

Is my idea right ? Hope your help

Regards,

Michael.

My thought would be that they want you to blend that edge and only that edge. On the left hand side there is a similar (but not exactly the same) chamfer.

This looks like a cylinder with a seal groove on the outside so I'm guessing the right hand side would slide into another component and it is vital this edge doesn't catch. On the left hand side this is maybe not the case so to save time you don't need to blend that one.

Hadn't considered a cylinder.

It would be good to see the entire drawing.

Sor some reason, I thought it was flat.

sleeve will have chamfer 0.50x30deg inside edge .012rad ( this mean no sharp edge)~ 0.3 mm

The drawing is dimensioned in inches, not mm.

It's dimensioned in both. That's why each dimension reads like this: .50 (12.7) You might wonder what incredible powers of intuition would enable me to conclude that the ID of this cylinder is about 24 5/8 inches. I trust that the OP knows that .012 and .12 are not the same, despite the fact that he uses them interchangeably in his first post.

OOPS! Just repeating what OP said.

The chamfer and inner bore line meeting point should not be sharp and should be rounded off with 0.12R. You should select the tool accordingly or you should round it off with another tool.

Srinivasan Raghavan

Thank you everyone,

Yes, this issue seems so simple after Nothing is Impossible answers, he's right ( This is a cylinder,... allow a seal or O-ring to slide together on assembly)

I think my difficulty is solved now,

so i think i should close this topic, right

Thank you very much for all help,

Best regards,

The note is a little ambiguous. As there are two chamfers, one on the left side of the x-section and one on the right side I would assume that the note means that the blend radius should only be made on the top edge of the right side chamfer.

However it is always best to check with the design authority before making assumptions. Always contact the customer when there is some doubt, you don't want to have to remake the part and have a dispute about who's to blame over the drawing interpretation.

If you establish a good working relationship and work together with your customer you are more likely to get repeat orders.

DaveD,

Thank you very much

Thank you everyone,

Yes, this issue seems so simple after Nothing is Impossible answers, he's right ( This is a cylinder,... allow a seal or O-ring to slide together on assembly)

I think my difficulty is solved now,

so i think i should close this topic, right !?

Thank you very much for all help,

Best regards,