Precision Granite Angle Bracket | ZHHIMG Black Granite
Anyone who has specified granite angle brackets or granite angle plates for alignment work already knows the short answer: stability. Here's the longer one.
- • No thermal drift — granite's coefficient of thermal expansion sits roughly an order of magnitude below aluminum and several times below steel, so this bracket holds its geometry as ambient temperature shifts through a normal workday.
- • No magnetic interference — unlike ferrous metal brackets, granite introduces zero magnetic field distortion, which matters directly for magnetic encoders, Hall-effect sensors, and certain optical alignment setups.
- • No corrosion, no burrs — granite doesn't rust, and it doesn't raise the small metal burrs over time that quietly throw off a mating surface.
- • Long-term dimensional retention — a properly manufactured granite bracket holds its ground tolerances for years under normal handling, rather than gradually shifting the way stressed or work-hardened metal can.
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Model |
Details |
Model |
Details |
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Size |
Custom |
Application |
CNC, Laser, CMM... |
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Condition |
New |
After-sales Service |
Online supports, Onsite supports |
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Origin |
Jinan City |
Material |
Black Granite |
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Color |
Black / Grade 1 |
Brand |
ZHHIMG |
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Precision |
0.001mm |
Weight |
≈3.05g/cm3 |
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Standard |
DIN/ GB/ JIS... |
Warranty |
1year |
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Packing |
Export Plywood CASE |
After Warranty Service |
Video technical support, Online support, Spare parts, Field mai |
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Payment |
T/T, L/C... |
Certificates |
Inspection Reports/ Quality Certificate |
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Keyword |
Granite Machine Base; Granite Mechanical Components; Granite Machine Parts; Precision Granite |
Certification |
CE, GS, ISO, SGS, TUV... |
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Delivery |
EXW; FOB; CIF; CFR; DDU; CPT... |
Drawings’ format |
CAD; STEP; PDF... |
This style of granite angle bracket typically shows up wherever engineers need a rigid, drift-free right-angle reference that won't fight the rest of the measurement system:
- • CMM and inspection fixture assembly, where the bracket holds a sensor or probe mount at a fixed angle relative to a granite base plate.
- • Optical and laser alignment rigs, where magnetic neutrality matters as much as mechanical rigidity.
- • Semiconductor and inspection equipment sub-assemblies, supporting linear stages or reference surfaces that can't tolerate thermal creep.
- • Calibration lab fixtures, where the bracket itself needs to be periodically re-certified and must hold its geometry between calibration cycles.
In each of these cases, the appeal isn't just "it's granite" — it's that the bracket, once installed and verified, effectively disappears from the list of things an engineer has to keep re-checking.
We use various techniques during this process:
● Optical measurements with autocollimators
● Laser interferometers and laser trackers
● Electronic inclination levels (precision spirit levels)
1. Documents together with products: Inspection reports + Calibration reports(measuring devices) + Quality Certificate + Invoice + Packing List + Contract + Bill of Lading(or AWB).
2. Special Export Plywood Case: Export fumigation-free wooden box.
3. Delivery:
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Ship |
Qingdao port |
Shenzhen port |
TianJin port |
Shanghai port |
... |
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Train |
XiAn Station |
Zhengzhou Station |
Qingdao |
... |
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Air |
Qingdao Airport |
Beijing Airport |
Shanghai Airport |
Guangzhou |
... |
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Express |
DHL |
TNT |
Fedex |
UPS |
... |
How accurate is a granite angle bracket like this one? Accuracy depends on the specified grade and the customer's drawing, but ZHHIMG® grinds reference edges to standards consistent with DIN 876 flatness/straightness grading, with final verification against calibrated instrumentation including Mahr indicators and WYLER electronic levels.
Can the bore size or bracket dimensions be customized? Yes. Bore diameter and position, overall thickness, and edge tolerances are all configurable to a customer drawing or sample part.
Will this bracket work in a magnetically sensitive setup? Yes — granite is non-magnetic and introduces no measurable field distortion, which is one of the primary reasons it's specified over aluminum or steel brackets in sensor and encoder assemblies.
How does a granite bracket compare to an aluminum one for cost and lead time? Granite brackets typically involve longer lead times than off-the-shelf aluminum brackets due to grinding and finishing steps, but they eliminate recurring recalibration and drift-related rework — for many QC-sensitive applications, that trade-off favors granite over the life of the equipment.
Do you provide calibration documentation with the part? Calibration and inspection reports can be provided on request, with instrumentation traceable to national metrology institutes.
QUALITY CONTROL
If you can’t measure something, you can’t understand it!
If you can’t understand it.you cant control it!
If you can’t control it, you can’t improve it!
More information please click here: ZHONGHUI QC
ZhongHui IM, your partner of metrology, help you succeed easily.
Our Certificates & Patents:
ISO 9001, ISO45001, ISO14001, CE, AAA Integrity Certificate， AAA-level enterprise credit certificate…
Certificates and Patents are an expression of a company’s strength. It’s society’s recognition of the company.
More certificates please click here: Innovation & Technologies – ZHONGHUI INTELLIGENT MANUFACTURING (JINAN) GROUP CO., LTD (zhhimg.com)
