In the Archive
214reviews
Latest Review
Hartwell Precision Machining, Cleveland OH
214 manufacturer reviews across CNC machining, injection molding, sheet metal, and additive — written for procurement managers, mechanical engineers, and founders who need verdict over spec-sheet marketing.
214
Manufacturer Reviews
18
Process Categories
6 yr
On the Floor
Every manufacturer has a data sheet. Most will tell you their tolerances hold to ±0.001″. Some of them are right. Chronicle exists for the gap between the spec and the part — the human decisions, the tooling choices, the shift supervisor who actually runs the floor.
We visit facilities. We run sample orders. We talk to the machinists, not just the sales reps. Then we write it down, without a sponsorship relationship in sight.
214
Reviews Published
47
Manufacturers Revisited
12k+
Engineers Reading Monthly
0
Sponsored Reviews
Cleveland, OH
Tolerances held across the full run. Surface finish on the bores was cleaner than the print asked for.
We ran a 500-piece prototype order for a hydraulic manifold. Hartwell quoted 6 weeks, delivered in 4. The CMM report came with every shipment, unsolicited.
Portland, OR
Bend radii consistent. Powder coat adhesion had one lot failure — they caught it before shipment.
Grand Rapids, MI
Good gate placement, sink marks on wall transitions thicker than 3mm. Ask for flow simulation upfront.
"Chronicle found the issue with our coolant system before our own QC team did. We changed the program."
Marcus Webb
Operations Director, Hartwell Precision
Austin, TX
DMLS titanium parts held ±0.003″ on critical features. Post-processing adds 5 days — budget accordingly.
Denver, CO
TIG welds on the 304 SS frames were clean and fully penetrated. Distortion control was impressive on thin wall.
Detroit, MI
Porosity on the first tool pull was addressed with venting changes by week two. Cycle time is their real advantage.
"The burr critique was fair. We've since added a dedicated deburring station on that line."
Renata Nowak
Quality Manager, Meridian Stampings
Minneapolis, MN
Swiss-turn capability down to 2mm diameter. Threading was concentric on 100% of the sample pull.
Columbus, OH
Burrs on progressive die blanks needed secondary deburring. Tool maintenance schedule needs tightening.
San Jose, CA
Wall thickness variation on deep draws was within 8%. Draft angles on the tool were perfect.
"We disagreed with the sink mark assessment — but we ran the simulation anyway. They were right."
Sanjay Krishnamurthy
Process Engineer, PolyForm Midwest
Hartwell Precision Machining · Cleveland, OH
In 14 years covering contract manufacturing, we've toured maybe 80 shops. Hartwell is the first one where the floor supervisor corrected our measurement terminology — politely, accurately, and without being asked.
Stratum Additive Solutions · Austin, TX
Most additive shops will print anything you hand them. Stratum pushed back on our titanium bracket design — the wall thickness on one feature was going to cause delamination on cool-down. They were right.
