Drill Service lists and stocks the full range of centre drills and spotting drills. The accuracy, geometry and protection of centre holes will secure the quality of the ultimate machining operations.

Hole and shafttoleranceChart

If we don’t stock the tools you want we can supply specials, modifications and further coating for your own bespoke requirements.

J6ToleranceChart

ISOToleranceChart for holes and shafts PDF

tolerance table_dir = 'you'll need to work this out for yourself' (creo install directory probably) look for *.ttl* files

Spotting drills are available in solid carbide, HSCo, Hss and Tin Coated.  Available with 82°, 90°, 120°, 140°, 150° with straight or taper shank in standard and long series lengths.  Spot drills are also available for left hand use.  We stock two forms Spade for harder materials and Helical for softer.

k finding a reliable supplier in China. It can be very difficult. I just had some aluminum prototypes made by a company I found on Alibaba and the tolerances were not even close to being correct. I was very specific and clear about the tolerances that I wanted and how the parts should fit together. However, when the parts arrived they would not fit together and were all about +/- 0.5mm or worse. I am sure there are better suppliers out there, just be skeptical of anything they tell you.

You should now be able to select plus/minus and then the box will give you options general\broken edge\shaft\hole from there you can select H6 or whatever you need.

M6tolerancefor Shaft

ISOToleranceChart

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I am having trouble figuring out how to get the tolerance tables to work.  I am not able to select hole or any of the values.

H7ToleranceChart

If it's "add1", then it should work.  If it is a "d1", then you need to load the hole tables into the model and assign the fits to the model dimensions.

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Be sure to check out our drill sets and wide range of tools on the website. If you have any questions please contact customer service team on 01293 774911

Our centre drill products are available in HSS, HSCo and Carbide as well as coated (Tin, Red ‘X’ and Hard ’X’). In many profiles and angles including 60°, 82°, 90°, 100°, 120° from stock to suit a variety of jobs and conditions.   Radius, Bell Type, W form, Left Hand, Long Series and American and British Standard are all available from stock. Suppliers include from Europe Magafor and Ilix, from the USA Ohio and Starlite.

Centre drill and spotting drill bits (also known as centring drills) are tools used for similar operations. Both are designed for spotting the location for the following drilling operation. A centre drill has a pilot producing a centre hole.

I'm not sure - because you use Creo 4.0 (I'm on Creo 2.0), and also I'm guessing from your screenshot: but you seem to be loading the tolerance tables into the drawing?  And the dimensions you are concerned with - are they "shown" dimensions, or are they drawing annotations?