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55050828 Driver Bronze Sandvik rock drill Coupling Hlx 5 sleeve Tamrock Spline bushing 550 508 28

55050828 Driver Bronze – Gets Your Sandvik Drill Back to Work Faster

The 55050828 Driver Bronze is a coupling sleeve and spline bushing that sits between the shank adapter and rotation unit on Sandvik HLX 5, HLX 5t, Hfx 5t, and RDX 5 rock drills. Same fit on equivalent Tamrock rigs. Instead of stocking multiple part numbers, this one covers several common models.

  • Replaces Sandvik part no. 55050828 directly – no modifications needed
  • Bronze alloy holds up against constant impact and high torque
  • Splines are machined to match factory specs, so torque transfer stays smooth
  • Fewer change-outs because the material resists galling and premature wear
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55050828 Driver Bronze Sandvik rock drill Coupling Hlx 5 sleeve Tamrock Spline bushing 550 508 28
#283
Highlights
Key Advantages
  • Built to original Sandvik 55050828 dimensions, so you don't fight with alignment or fit. Drops right in.
  • Bronze takes a beating. This alloy handles the hammering and rotational loads underground without cracking or deforming early.
  • Spline profile matches OEM geometry. Less backlash means less wear on your shank adapter and rotation motor over time.
  • One part covers HLX 5, HLX 5t, Hfx 5t, RDX 5 and matching Tamrock rigs. Keeps your spares list short.
Use Cases
Applications
  • Underground hard rock drilling with Sandvik HLX 5 and HLX 5t rigs
  • Surface bench drilling on Hfx 5t carriers
  • Tunnel face drilling and development rounds with RDX 5 setups
  • Rebuilds and maintenance on Tamrock drills that use the same coupling design
  • Production mining where a stripped spline stops the whole shift
  • Quarry drilling that runs 10+ hours a day in abrasive rock
Specs
Technical Specifications
BrandSandvik (aftermarket direct-fit replacement)
Part Number55050828
DescriptionDriver Bronze / Coupling Sleeve / Spline Bushing
Compatible ModelsHLX 5, HLX 5t, Hfx 5t, RDX 5 (also fits Tamrock equivalents)
MaterialWear-resistant bronze alloy
FunctionTransfers rotation and impact from the motor to the shank adapter
Spline TypeMachined internal and external splines
OEM Reference550 508 28
Details
Detailed Description
Brand :Sandvik
Part No. :55050828
Description :Driver Bronze
Use in :Hfx 5t , Hlx 5 , Hlx 5t , Rdx 5

55050828 Driver Bronze Sandvik rock drill parts Coupling Hlx 5 sleeve Tamrock Spline bushing 550 508 28


FAQ
FAQ
Which drills take this 55050828 driver bronze?
It's a straight swap for Sandvik HLX 5, HLX 5t, Hfx 5t, and RDX 5. Also works on Tamrock rigs that share the same coupling. If your machine uses part 55050828, this fits.
Is this a genuine Sandvik part?
No, it's an aftermarket replacement made to the same prints and material spec. You get equivalent performance for less money, and we haven't seen unusual failure rates compared to the Sandvik-branded version.
What material is it made from?
High-strength bronze alloy. We spec this because it handles the constant pounding and twisting better than most steels in this spot. It wears slowly and doesn't gall the mating steel parts.
How do I know when it's time to replace this part?
Pull it during a regular inspection. Look for splines that are starting to knife-edge or show spalling. If you hear clunking from the rotation unit or see metal flakes in the grease, swap it out before it takes the shank adapter with it.
What's the lead time?
We keep these on the shelf. Most orders ship same day or next business day. Typical transit is 3–7 business days depending on where you are. For emergency orders we can use express freight.
Will this actually improve drilling speed?
Not directly like a hammer, but a tight spline connection means less energy is lost to slop. So more of your rotation torque goes into the bit. Combined with a new shank adapter, it can help keep penetration rates steady between rebuilds.
Stock
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