Tripar’s founding & the early years (1949-59)


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.

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Tripar Default Manufacturing Tolerances

Do you have a project in mind but not sure what tolerances to use? Don’t worry we got you covered. Here’s a overview that you can use to build your product.

In the absence of the client providing a drawing with agreed upon tolerances, the part(s) shall be manufactured as the per clients supplied CAD model, with the following Tripar default manufacturing tolerances:

The sketch above is for illustrative purposes only. 

Table 1. Default Tolerances

DIMTolerance (“ ±)Description
±0.010”Holes1 & linear dimensions of flat pieces < 0.5”
±0.015Holes1 & linear dimensions of flat pieces 0.5”< 4.0”
±0.020Holes1 & linear dimensions of flat pieces 4.0” < 12.0”
Upon ReviewHoles1 & linear dimensions of flat pieces > 12.0”
A±0.010End to hole or bend
B±0.010Hole center-to-center (on one surface/plane)
C±0.015Bent edge to hole2
D±0.020Distance over 2 bends2
EUndefined (TBD)Distance over 3 or more bends2
F± 2° Angles3
R1-2X 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 considering providing their own tolerance drawings, please see the following two TriparTech article on this subject, as well a sound sheet metal design practices; 


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.


Small burrs are an inherent part of metal stamping & fabrication processes. Being nearly impossible to quantify & measure, unless otherwise specified parts are provided in their “as stamped” or “as fabricated” condition. 

Assemblages de Downlight UL1598 et nouvelles capacités de fabrication

Downlight Assemblies Catalog

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.

Click here to download this new version of our online catalog.

New CNC Punch Press

We also recently acquired a new major piece of production machinery: another Trumpf, this time a TruPunch 1000 CNC Punch Press.

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 ManufacturingClick here to read our dedicated TriparTech on this subject.

10th Anniversary

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.