This article features the experience of Tripar’s founder, Ben Sevack’s from England to Montreal during the pivotal years of 1923 to 1949. Additionally, we’ll shift more into the foundational period of Tripar, spanning from its establishment in 1949 to the first 10 years in business.
Have a sheet metal project in mind? Not sure what tolerances to use? Don’t worry.
Here are some basic tolerances you can use to build your own sheet metal components and parts, from our 75+ years of experience.
In the absence of drawing tolerances, your part(s) will be manufactured as perTripar’sdefault tolerances below.
The sketch above is for illustrative purposes only.
Standard Default Tolerances
DIM
Tolerance (“ ±)
Description
±0.010”
Holes1 & linear dimensions of flat pieces < 0.5”
±0.015
Holes1 & linear dimensions of flat pieces 0.5”< 4.0”
±0.020
Holes1 & linear dimensions of flat pieces 4.0” < 12.0”
Upon Review
Holes1 & linear dimensions of flat pieces > 12.0”
A
±0.010
End to hole or bend
B
±0.010
Hole center-to-center (on one surface/plane)
C
±0.015
Bent edge to hole2
D
±0.020
Distance over 2 bends2
E
Undefined (TBD)
Distance over 3 or more bends2
F
± 2°
Angles3
R
1-2X Material thickness
Inside bend radii
1 If the hole is not round, the above ranges apply to the largest dimension in the opening.
2 As measured nearest to bend(s).
3 Thin metals have some flexibility, and thus can deflect, even under their own weight. As such, tolerance applies up to 1” from the bend. For reference; 2° over 1” = .034”.
For those who provide, or are consideringproviding their own tolerance drawings, please see the following two TriparTecharticle on this subject, as well a sound sheet metal design practices.
Finish
Surface Finish:Shall be in accordance with material specified and associated governing specifications.
Formed or bent parts may have small surface blemishes near the areas of transition.
Residue: Metal fabricated parts are often produced and may be shipped with lubricants or dry film lubricants.
Protective Film: For raw materials which come with a protective film, parts shall be provided with this film, to help protect the parts until you, the customer remove when desired.
Burrs
Please note: having minimal small burrs is a normal part of metal stamping and CNC fabrication processes. Being nearly impossible to quantify & measure, unlessotherwisespecified, parts are provided in their “as stamped” or “as fabricated” condition. Additional costs for deburring (as an extra operation) can be arranged if need be.
In January 2021, Tripar added the Downlight UL1598 Assemblies section to its online catalog. We are pleased to now offer this as a pdf; a concise 14-page easy print option, that still displays the different assembly options available.[/mk_fancy_title]
[mk_fancy_title color=”#4c4d4f” size=”22″ line_height=”120″ font_family=”none” el_class=”f-title”]Click here to download this new version of our online catalog.[/mk_fancy_title][mk_fancy_title color=”#4c4d4f” size=”22″ line_height=”120″ font_family=”none” el_class=”f-title”]
New CNC Punch Press
[/mk_fancy_title][mk_fancy_title color=”#4c4d4f” size=”22″ line_height=”120″ font_family=”none” el_class=”f-title”]We also recently acquired a new major piece of production machinery: another Trumpf, this time a TruPunch 1000 CNC Punch Press.[/mk_fancy_title]
[mk_fancy_title color=”#4c4d4f” size=”22″ line_height=”120″ font_family=”none” el_class=”f-title”]This further expands Tripar’s CNC metal fabrication capabilities, adding to its previous compliment of two CNC Lasers, a CNC Punch/Laser Combination machine, and a growing number of CNC Press Brakes. All of these, together with our huge compliment of metal stamping presses, allows Tripar to offer the Hybrid Manufacturing.
What’s Hybrid Manufacturing? Click here to read our dedicated TriparTech on this subject.[/mk_fancy_title]
Tripar celebrates its 10th Anniversary by purchasing 130,000 sq.ft of land located on Maurice Duplessis Boulevard on the island of Montreal to build their new factory.