CDI Torque 401SM Micro-Adjustable Torque Screwdriver for Precisely Controlled Torque Output

Scott F Rose: Excellent quality torque wrench for spaces too tight for a ratchet style torque wrench.

Canada on Dec 13, 2023

Amazon Customer: Parfait produit. Meilleur prix sur Amazon que chez notre fournisseur habituel. Le certificat de calibration est conforme à nos besoins.

Canada on Aug 08, 2021

Robin Bailey: Best quality torque screwdriver I have seen. CDI makes good stuff!

Canada on Dec 09, 2019

C A O'Shea: Works good and half the price of the Snap On one.

Canada on Jul 04, 2019

Glenn: An excellent inch-pound torque driver.

Canada on Jun 28, 2018

PhiQuanTu: I bought this to mount a rifle scope onto my AR15. From extensive researches, I narrowed down my selection to this CDI 401SM (it's basically a Snap-on tool) and the Wiha TorqueVario-S screwdrivers. Both got very good reviews, but the Wiha is $10 cheaper. I ended up choosing this CDI screwdrivers due to the fact that it's made in the USA, more compact looking, and the best of all is that I don't need a second tool to adjust the torque whereas with the Wiha you need a SEPARATE wand that you have to insert into the main screwdriver and crank it to the desired torque level. All I have to do with this CDI tool is to pull the adjustment cap on the bottom out and rotate it to the desired torque level. I just don't want to kick myself in the head for losing that second-piece adjustment tool or run around looking for it everytimes I need to adjust the torque on the Wiha. Plus, the Wiha includes an extension that does NOT house 1/4" bits. In order for it to accept the normally used (in the USA) 1/4" bits , you have to chip out another $12 for the right size extension. So....it's pretty much a no brainer for me to pick this CDI Torque screwdriver for the reasons above.

The product...

United States on Mar 24, 2014

Larry Petro: This CDI micro torque screwdriver is a product distributed through (besides Amazon) Snap-On. This is one of those tools that I don't use that often, but when its needed it is Really needed. Before I bought this item a little over a year ago I did quite a bit of on-line research and discovered that this CDI tool was literally the "only game in town" in terms of accuracy and reliability. The only other contender that even came close (but not very close) was a torque screwdriver sold by Brownells. Since I do not have a calibration lab I went by the accounts of multiple on line sources, and would suggest that you might do the same...things might have changed in the past year. Amazon had the best IN STOCK price I was able to find a year ago.

I do my own gunsmithing and use this tool whenever a precise amount of torque is required per a manufacturers specifications. The torque settings are easy to see and adjust within one inch pound increments. The tool accepts regular screwdriver type bits, and therefore will accept just about anything used to tighten small machine parts. So whether you are tightening a screw or a nut (or something in between), and you have the bit to fit your...

United States on Jan 14, 2013

David S.: When considering this tool to purchase - it should be noted that when you are using a tool 24 hours on all shifts (sounds like 24x7) - you also are probably using it more than just once each hour.

Once each hour would result in a 5,000 use cycle occurring every 208 days. However, in a busy industrial environment - using this tool just twice each hour - results in 5000 cycles every 104 days. Essentially - every 90 days. You also have the fact that using any torque wrench in the upper or lower ends - decreases the life of said wrench. All of this information is readily available from CDI. The following are quotes from them as to the care of their tools and torque wrenches in general:

"To determine which torque wrench capacity is best suited for an application, many factors must be considered. However, as a recommendation, use a torque wrench in the middle 50% of the overall capacity of the tool. This will result in longer tool life, ease of use for the operator and increased accuracy from "clicker" type torque wrenches

Torque wrenches should be "exercised" a minimum of three times at 100% of full scale before use

Torque wrenches will last longer if...

United States on Dec 19, 2012