What is a silicon carbide shaft used for?

A silicon carbide shaft provides a ceramic shaft or support surface in pumps and rotating equipment where a metal shaft would be damaged by corrosion, abrasive particles, chloride media or thermal cycling. Typical uses include chemical pumps, slurry pumps, magnetic drive pumps and desalination equipment.

Is SSiC or RBSiC better for a silicon carbide pump shaft?

Neither is better across the board. SSiC is selected for wear-contact surfaces and demanding chemical service. RBSiC suits larger or more complex shapes when the fluid and temperature conditions match its characteristics. The route is confirmed against media, load, shaft size, temperature and the assembly design, and stated on the order.

Can ADCERAX make a silicon carbide shaft according to my drawing?

Yes. Drawings, samples or worn parts can all start the review. Diameter, length, bores, steps, grooves, end features, surface finish and inspection points are evaluated before quotation.

What information is needed to quote a custom SiC shaft?

A drawing or sample photo is preferred. The review also covers shaft dimensions and tolerances, working media, temperature, load, rotational condition, mating bearing or sleeve material, surface finish requirement and order quantity.

Can a silicon carbide shaft replace a metal shaft in chemical pumps?

In many corrosive or abrasive pump systems it can, but the full assembly must be reviewed. A ceramic shaft needs suitable support, alignment, mating components and installation conditions; the shaft material alone does not qualify the pump.

What surface finish should be specified for a silicon carbide pump shaft?

The finish follows the bearing, sleeve and seal interfaces. Ground contact surfaces are standard; polished areas are specified where the contact pair requires them. Mark the roughness requirement and measurement location on the drawing so it can be confirmed at first article.

Silicon Carbide Pump Shafts Supplier | Solid & Hollow

A silicon carbide shaft is a precision ceramic rotating component used in pumps and fluid-handling systems where metal shafts may suffer from corrosion, abrasive wear, chloride pitting or thermal distortion. ADCERAX provides custom SiC shafts made from sintered silicon carbide or reaction-bonded silicon carbide for chemical pumps, slurry pumps, magnetic drive pumps and desalination equipment.

Solid Silicon Carbide Shaft Sizes

Type1- Hollow Silicon Carbide Shaft Sizes

SiC Shaft with Solid
Item No.	Diameter (mm)	Length (mm)	Purity（%）
AT-SCB-001	8	10-500	85-99
AT-SCB-002	10	10-500	85-99
AT-SCB-003	12	10-500	85-99
AT-SCB-004	17	10-500	85-99
AT-SCB-005	20	20-500	85-99
AT-SCB-006	22	20-500	85-99
AT-SCB-007	28	20-500	85-99
AT-SCB-008	31	40-500	85-99
AT-SCB-009	45	40-500	85-99
AT-SCB-010	50	40-500	85-99
AT-SCB-011	83	40-500	85-99
AT-SCB-012	92	80-500	85-99

Type2- Hollow Silicon Carbide Shaft Sizes

SiC Shaft with Hollow
Item No.	Outer Diameter (mm)	Inner Diameter (mm)	Length (mm)	Purity（%）
AT-SCG-001	16	6	42	85-99
AT-SCG-002	16	8	42	85-99
AT-SCG-003	18	10	42	85-99
AT-SCG-004	20	10	45	85-99
AT-SCG-005	24	12	51	85-99
AT-SCG-006	24	12	51	85-99
AT-SCG-007	24	10	51	85-99
AT-SCG-008	25	12	56	85-99
AT-SCG-009	28	14	60	85-99
AT-SCG-010	28	14	70	85-99
AT-SCG-011	28	14	70	85-99
AT-SCG-012	28	14	60	85-99
AT-SCG-013	30	16	70	85-99
AT-SCG-014	30	16	70	85-99
AT-SCG-015	32	16	85	85-99
AT-SCG-016	32	16	85	85-99
AT-SCG-017	32	18	85	85-99
AT-SCG-018	32	18	85	85-99
AT-SCG-019	32	20	85	85-99
AT-SCG-020	32	20	85	85-99
AT-SCG-021	32	15	85	85-99
AT-SCG-022	32	15	85	85-99
AT-SCG-023	32	22	85	85-99
AT-SCG-024	32	22	85	85-99
AT-SCG-025	32	18	74	85-99
AT-SCG-026	32	18	74	85-99
AT-SCG-027	40	20	85	85-99
AT-SCG-028	44	25	108	85-99
AT-SCG-029	49	25	108	85-99
AT-SCG-030	49	30	108	85-99
AT-SCG-031	49	28	108	85-99
AT-SCG-032	49	25	108	85-99
AT-SCG-033	49	25	108	85-99
AT-SCG-034	49	24	108	85-99
AT-SCG-035	49	25	108	85-99
AT-SCG-036	58	35	140	85-99
AT-SCG-037	58	30	123	85-99
AT-SCG-038	68	40	150	85-99

Download Size Guide

How to Specify the Right SiC Pump Shaft

1. Identify the Part’s Role

Confirm whether the component is a rotating shaft, fixed support shaft or bored sleeve.

Each role requires different geometry, contact surfaces and mating fits.
Identify the assembly position before selecting a catalog size or preparing a drawing.

2. Choose Solid or Hollow Construction

Solid shafts: Available across a wide diameter range for rotating and fixed-shaft positions.
Hollow parts: Provide a bore for fluid passage, internal support or weight reduction.
Dimensions to define: OD, length, bore construction and depth, end features and minimum wall thickness.

3. Match the Material to the Duty

RBSiC: Supports a wide range of geometries. Its residual free silicon requires particular compatibility checks for strongly alkaline media and concentrated HF or HNO₃.
SSiC: Has no residual silicon phase and is considered for demanding chemical duties and wear contact with SiC bearings or sleeves.
Conditions to confirm: Fluid chemistry, concentration, temperature and operating cycles, particularly for mixed acids, alkalis or changing process conditions.

4. Define the Working Surfaces

Identify bearing seats, seal faces, sleeve interfaces and impeller fits on the drawing.

Finish options: Ground surfaces as standard, with polishing where required by the contact pair.
Inspection details: Specify roughness, measurement locations and inspection methods for first-article confirmation.

5. Confirm the Final Drawing

AT-SCB and AT-SCG catalog numbers identify a size family. The drawing defines the finished component.

Include: Dimensions, tolerances, end features, steps, grooves, flats, contact surfaces and acceptance criteria.
To begin: Provide a drawing or a sketch showing the key dimensions and assembly interfaces.

Engineering Performance Factors for Silicon Carbide Pump Shaft Design

The Silicon Carbide Shaft demonstrates stable mechanical, thermal, and chemical behavior under corrosive liquids, high-temperature cycles, and abrasive slurry conditions, making it suitable for evaluation by laboratory testing institutions and industrial material qualification processes.

Property	Unit / condition	AD-SIC-RB · RBSiC	AD-SIC-SS · SSiC
SiC content	wt%	85 nominal	≥99
Residual free silicon	phase basis	15 wt% nominal	No silicon-infiltration phase
Bulk density	g/cm³	≥3.02	3.10 typical
Apparent open porosity	vol%	≤0.1	<0.1
Flexural strength	MPa, 20 °C	250	380
Flexural strength	MPa, 1200 °C	280	/
Compressive strength	MPa	/	≥2600
Young's modulus	GPa, 20 °C	330	420
Young's modulus	GPa, 1200 °C	300	/
Poisson's ratio	–	/	0.16
Thermal conductivity	W/(m·K)	/	100–120
Thermal conductivity	W/(m·K), 1200 °C	45	/
Application-temperature ceiling	°C, initial selection only	1380	1600

SSiC vs RBSiC Silicon Carbide Shaft Selection

ADCERAX can review sintered silicon carbide and reaction-bonded silicon carbide options according to the pump media, load condition, dimensional requirement and cost target.

SSiC shafts are usually selected when high chemical resistance, wear stability and dense ceramic performance are required in aggressive media.

RBSiC shafts may be considered when larger or more complex shapes are needed and the operating conditions match the material’s application range.

Before quotation, our team reviews the working fluid, particle content, operating temperature, rotational speed, shaft size, end structure and mating parts to help select a practical SiC material route.

Packaging Method for Silicon Carbide Shaft

Each silicon carbide pump shaft is wrapped and cushioned to protect finished surfaces and edges during handling and transit. Contact surfaces, bores and end features are individually protected. Packaging type and configuration are confirmed with the order and the part drawing.

Silicon Carbide Pump Shaft Applications in Corrosive and Abrasive Service

Select the SiC grade, shaft geometry and mating components together. Each application places different demands on the working surfaces, fits and operating conditions.

Chemical Circulation and Process Pumps

Chemical exposure can damage wetted metal surfaces and change the diameter at bearing or packing seats. SiC selection must account for the actual fluid and the materials touching the shaft.

1. Design focus: Wetted surfaces, bearing-seat dimensions and compatibility with the mating bearing or sleeve.
2. Key information: Fluid identity, concentration, continuous and peak temperatures, exposure duration and cleaning cycles.
3. Special attention: Mixed, dilute or changing chemistry requires review of the actual composition.
Slurry and Particle-Loaded Pump Systems

Particles can wear the shaft’s bearing, sleeve and seal contact zones, changing clearances and alignment. Material selection and surface requirements should reflect the solids and contact conditions.

1. Design focus: Working surfaces, mating clearances, support spacing and surface finish.
2. Key information: Particle size, solids concentration, rotational speed and contact-pair materials.
3. Inspection: Mark wear-measurement locations on the drawing so new and replacement parts are checked consistently.
Seawater, Brine and Desalination Equipment

Chloride exposure can cause pitting and crevice corrosion around metal seal and bearing interfaces. Review the SiC shaft together with all other wetted components.

1. Design focus: Compatibility of the shaft, seal faces, bearings and housing with the same medium.
2. Key information: Chloride concentration, sand and suspended solids, operating pressure and temperature changes.
3. Assembly check: Confirm the seal and bearing arrangement; shaft corrosion resistance alone does not establish pump suitability.
Magnetic Drive and Sealless Pumps

These assemblies depend on controlled shaft-to-bearing fits, alignment and adequate lubrication. Shaft wear, increased friction or runout can affect pump performance.

1. Design focus: Shaft diameter, coupling interface, bearing and bushing materials, radial load and allowable runout.
2. Key information: Lubricating properties of the pumped fluid and potential dry-running conditions.
3. Part identification: State whether the shaft rotates or remains fixed, as the support and inspection requirements differ.

Silicon Carbide Shaft Handling, Installation and Maintenance Guidelines

Silicon carbide shafts require protection from impact, point loading and uneven clamping. Follow the pump’s assembly and maintenance procedures throughout handling and service.

Handling & Pre-Installation Checks

1. Protect finished surfaces: Keep the shaft padded until assembly. Avoid impact or edge loading on bearing seats, chamfers and end features.
2. Inspect before fitting: Check for chips, cracks, contamination and dimensional mismatch.
3. Clean mating parts: Remove abrasive particles and metal debris from bearings, sleeves, seals and housing surfaces. Use a lint-free cloth and avoid tools that could scratch the finish.
Installation & Alignment

1. Control assembly force: Align the shaft carefully. Avoid forced fits, uneven tightening and concentrated contact with metal parts.
2. Verify interfaces: Check shaft, bearing, sleeve, seal and impeller fits before final assembly.
3. Confirm movement: Ensure smooth rotation, correct axial position and even contact, without excessive friction or point loading.

Operating Conditions to Monitor

1. Track performance: Monitor vibration, noise, temperature and flow stability.
2. Investigate changes: Increased vibration or noise may indicate misalignment, bearing wear or particle buildup. Abnormal heating requires checks for lubrication problems, dry running or excessive friction.
3. Review the complete assembly: Consider fluid chemistry, particle size, solids content, lubrication and start-stop cycles together with the mating components.
Inspection, Cleaning & Storage

1. Inspect contact areas: Check end faces, bearing seats and seal interfaces at the specified intervals. Record wear at consistent locations.
2. Clean after corrosive service: Rinse and dry the shaft after acid, alkali or saline exposure, removing residue from bores and steps.
3. Store with protection: Keep shafts dry, padded and separated from metal tools and loose parts to protect edges and polished surfaces.

Start with three useful enquiry inputs

Part identification: catalogue code, drawing or old-part photographs.
Application: pump / assembly position and the job of the part.
Quantity and stage: prototype, replacement or batch supply.

Add any material grade and operating conditions already available. Engineering review then develops the following drawing and acceptance fields.

Review group	Drawing / application details
Geometry and fits	Each OD, ID and axial length; bore type / depth; steps, grooves, flats, ends, chamfers; tolerances and datums
Working surfaces	Mating bearing / sleeve / seal, contact position, finish, straightness, concentricity and runout requirements
Mechanical duty	Fixed or rotating role, support spacing, load direction, speed, start-stop cycle and installation method
Fluid and temperature	Composition, concentration, particles, lubrication, normal / peak temperature and process pressure
Approval and supply	Drawing revision, material specification, first-article checks, agreed measurement locations, sample / batch quantity and acceptance criteria

Catalogue No.	AT-SCB-001
Material	Silicon Carbide (SSiC / RBSiC)
Mechanical Strength	High hardness 23–26 GPa for abrasion resistance
Drawing-based geometry	Bores, steps, grooves, flats, chamfers, ends and finished contact surfaces
Dimensions/Sizes	Download PDF

Silicon Carbide Pump Shafts — Solid & Hollow

Solid Silicon Carbide Shaft Sizes