Thrust bearing packs
Worn or skidded thrust bearings that let the screw walk under axial process load. We replace the pack and set endplay correctly.
Houston, TX ยท Davis-Standard extruder gear reducer repair
Davis-Standard Gearbox Repair and Rebuilding
Davis-Standard reducers sit at the heart of a plastics, film, sheet, or rubber line. They take motor speed down and torque up, and they carry the axial thrust the screw throws back at them every minute the line runs. When one of those reducers starts to whine, run hot, or leak at the front shaft, the whole line is at risk. We rebuild these units at our Houston shop so you get a drive that is as strong as the original, often stronger, without waiting on a long OEM lead time. Our core work is extruder gearbox repair, and the Davis-Standard reducer is one of the units we see most.
Solution Gear Co. repairs and rebuilds Davis-Standard extruder gear reducers and thrust housings as an independent OEM alternative. We are a family owned Houston gear shop with all work done in house, free shipping both ways, free inspection, and up to a 24 month workmanship warranty.
We are a family owned shop, established in 1998, and every job stays in house from teardown to final test. We do not sub out the gear cutting, the bearing work, or the housing repair. That is how we control quality and how we stand behind a workmanship warranty of up to 24 months. If a reducer can be saved, we save it. If a gear set, thrust pack, or shaft is past its service life, we cut and build new from the right material rather than patch worn parts back together. Learn more about our gearbox repair process and the industries we serve.
A note on who we are. Solution Gear Co. is an independent repair shop. We are not an authorized Davis-Standard dealer and we are not affiliated with Davis-Standard or its parent company. We name the brand only to describe the equipment we service. We repair and rebuild these reducers as an OEM alternative.
What a Davis-Standard reducer actually does
Davis-Standard builds extrusion systems for plastics, film, sheet, and rubber, and the gear reducer is what turns the screw. Their next generation reducer uses a durable cast iron housing for quiet running and low vibration, case hardened precision ground helical gearing in a range of reduction ratios, and spherical roller thrust bearings that absorb the axial process load with a self centering design. The unit comes in horizontal form for belt driven and low centerline machines and vertical form for direct coupled and narrow footprint machines, including tight multilayer setups. Lubrication is either oil bath or partial immersion with forced lube depending on housing style.
That thrust pack is the part most people underestimate. As the screw pushes melt toward the die, an equal and opposite force pushes back along the screw axis straight into the reducer. On a large extruder that thrust can run into the hundreds of kilonewtons, and it never lets up. Everything we do on a rebuild is aimed at carrying that load cleanly for years, not months.
How these units fail, and what we look for
We have torn down enough extruder reducers to know where they go bad. The patterns repeat across single screw lines, sheet lines, and rubber cold feed extruders.
- Thrust bearing wear. This is the headline failure on extruder drives. Roller skidding, lube contamination, and constant axial load wear the thrust bearing until the screw starts to walk. Excess endplay shows up as inconsistent output and die pressure swings before the bearing actually lets go.
- Tooth root bending fatigue. Because these reducers run slow and at high torque, the dominant tooth failure is low cycle root bending fatigue, not just surface wear. Cracks start at the tooth root and can end in a brittle fracture that takes the line down with no warning.
- Pitting and spalling. Where surface fatigue does set in, you get pits and spalling on the tooth flanks, then noise and metal in the oil.
- Shaft and seal wear. The front output shaft rides spring loaded radial seals with a felt ring excluder. Worn seal journals and tired seals leak oil and pull in contamination, which then attacks the bearings.
- Overheating. Poor lube flow, a clogged cooler, or wrong oil drives temperature up, thins the film, and accelerates every failure above.
On inspection we check endplay, backlash, tooth contact pattern, bearing surfaces, shaft runout, and the housing bores. We tell you exactly what is worn and what it will take to make it right before any work begins.
How we rebuild it, stronger than worn
A Davis-Standard reducer rebuild at our shop starts with a full teardown, cleaning, and dimensional inspection of every component. We line bore and sleeve housing bores that have lost size, so the new bearings seat with the correct fit instead of a loose press. When a gear set is pitted, cracked, or worn past tolerance, we cut new gears in house through our gear cutting service, matched to the original ratio and finished to the right tooth geometry.
Thrust handling gets the attention it deserves. We replace the thrust bearing pack, set endplay correctly, and verify the screw axial position so the bearings carry that process load the way they were meant to. Worn shafts are built up and reground or replaced, and we set fresh radial seals on clean journals. Related work on bearing repair and screw and barrel repair often goes hand in hand with a reducer job, since a worn screw or barrel changes the loads the gearbox sees.
Every rebuild is reassembled, the contact pattern is verified, and the unit is run and checked before it ships back. We rebuild to be as strong as the original and often stronger, because we control the material and the fits the whole way through.
Houston home base, the whole country covered
Our shop is at 8449 West Belfort Ave in Houston, Texas. For Gulf Coast plastics, film, sheet, and rubber processors, we offer free local pickup and delivery, including crating and rigging, so a heavy reducer never becomes your logistics problem. Houston is home base, and we handle the lifting and the freight.
If you are outside the Houston area, distance is not an issue. We ship both ways for free. You send us the reducer, we inspect it for free, we rebuild it, and we ship it back, all on us. Plants in the Midwest, the Southeast, and across the country send units to our bench every week. See examples of our work in the gallery or reach out through our contact page.
What we repair and rebuild
What we fix.
Helical gear sets
Pitted, spalled, or root cracked case hardened helical gears. We cut and build new sets in house to the original ratio.
Output and input shafts
Worn seal journals, bearing fits, and spline or keyway wear. We build up and regrind or replace as needed.
Cast iron housings
Bores that have lost size or cracked. We line bore, sleeve, and repair so bearings seat with the right fit.
Radial shaft seals
Leaking spring loaded radial seals and felt ring excluders on the front output shaft. Fresh seals on clean journals.
Lubrication and cooling
Failed oil bath or forced lube circuits, clogged passages, and overheating issues that drive accelerated wear.
Horizontal and vertical reducers
Both belt driven low centerline horizontal units and direct coupled narrow footprint vertical units for multilayer lines.
Bearing and endplay setup
Correct bearing selection, fits, preload, and screw axial position so the rebuilt unit carries thrust as designed.
Common questions
What plants ask us.
Are you an authorized Davis-Standard dealer?
No. Solution Gear Co. is an independent repair shop. We are not authorized by or affiliated with Davis-Standard. We name the brand only to describe the equipment we service, and we repair and rebuild these reducers as an OEM alternative.
Can you rebuild a Davis-Standard reducer to be as strong as the original?
Yes. We rebuild to be as strong as the original and often stronger. We control the material, the gear geometry, and the bearing fits in house, so worn parts get replaced with new parts cut to the right spec rather than patched.
What does it cost to find out what is wrong with my reducer?
Nothing. Inspection is free, pickup and delivery are free including crating and rigging, and shipping is free both ways. You get a full report of what is worn before any work starts.
I am not near Houston. Can you still help?
Yes. We ship both ways for free, so distance is a non issue. Plants across the country send us reducers to rebuild. You send it in, we inspect and rebuild it, and we ship it back, all on us.
How long is the warranty on a rebuilt unit?
We offer up to a 24 month workmanship warranty. All work is done in house at our Houston shop, which is how we stand behind it.
Get your Davis-Standard reducer back to full thrust
Free shipping both ways, free inspection, and an up to a 24 month warranty on every rebuild. Tell us about your unit and we reply fast, often the same day.
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