Klingspor SMT 624 Supra Flap Disc 40 Grit | 125mm x 22.3mm | 322772 | Box of 5

Professional Zirconia Alumina P40 Flap Discs for Aggressive Grinding, Weld Processing, Edge Work and Stock Removal on Steel & Stainless Steel

Supply Solutions Group supplies Klingspor SMT 624 Supra Flap Discs – 40 Grit – 125mm x 22.3mm – Box of 5 (322772) for fabrication, welding, engineering, mining, construction, manufacturing, maintenance and professional metalworking applications throughout Australia.

The Klingspor SMT 624 Supra is a high-performance abrasive flap disc engineered for demanding grinding applications on steel and stainless steel. Its combination of zirconia alumina abrasive grain, a glass-fibre backing plate and a 12° convex profile delivers aggressive material removal while maintaining comfortable grinding characteristics. (Klingspor)

This particular version is:

Catalogue Number: 322772

Diameter: 125mm

Bore: 22.23mm

Grit: P40

Design: Convex

Maximum Speed: 12,250 RPM

Maximum Peripheral Speed: 80m/s. (Klingspor)

The coarse P40 grit is particularly suited to applications where rapid stock removal is more important than producing a fine finished surface, including weld grinding, edge preparation, beveling and general fabrication work.

The SMT 624 belongs to Klingspor's professional Supra performance class and uses zirconia alumina abrasive grain to provide high removal rates and strong service life in demanding applications. (Klingspor)

This Supply Solutions Group listing contains:

1 Box × 5 Klingspor SMT 624 Supra P40 Flap Discs – 125mm x 22.3mm – 322772. (Supply Solutions Group Pty Ltd)

As an Indigenous-owned industrial supplier and procurement partner, Supply Solutions Group provides Klingspor abrasives, flap discs, grinding discs, cutting discs, welding supplies, PPE and industrial consumables backed by responsive customer service, procurement support and Australia-wide business supply capability.

Product Type

• Product Type: Abrasive Flap Disc / Abrasive Mop Disc

• Brand: Klingspor

• Series: SMT 624 Supra

• Catalogue Number: 322772

• Performance Class: Supra

• Abrasive Grain: Zirconia Alumina

• Grit: P40 / 40 Grit

• Diameter: 125mm

• Bore: 22.23mm / commonly listed as 22.3mm

• Design: Convex

• Convex Angle: 12°

• Backing Plate: Glass Fibre

• Maximum Speed: 12,250 RPM

• Maximum Peripheral Speed: 80m/s

• Primary Materials: Steel & Stainless Steel

• Pack Quantity: 5 Discs

Key Features

• Genuine Klingspor abrasive product

• SMT 624 Supra professional range

• Catalogue number 322772

• Coarse P40 grit

• 125mm disc diameter

• 22.23mm bore

• Zirconia alumina abrasive grain

• Glass-fibre backing plate

• 12° convex profile

• Aggressive stock-removal performance

• High material-removal rate

• Strong service life

• Comfortable grinding characteristics

• Suitable for weld grinding

• Suitable for edge grinding

• Suitable for beveling

• Suitable for chamfering

• Suitable for surface preparation

• Suitable for steel

• Suitable for stainless steel

• Maximum 12,250 RPM

• Maximum peripheral speed 80m/s

• Suitable for compatible conventional angle grinders

• Box of 5

Technical Specifications

Specification	Details
Brand	Klingspor
Product	Abrasive Mop / Flap Disc
Series	SMT 624 Supra
Catalogue Number	322772
Performance Class	Supra
Abrasive Grain	Zirconia Alumina
Grit	P40
Diameter	125mm
Bore	22.23mm
Commercial Bore Description	22.3mm
Design	Convex
Convex Angle	12°
Backing Plate	Glass Fibre
Maximum Peripheral Speed	80m/s
Maximum RPM	12,250 RPM
Primary Material	Steel
Primary Material	Stainless Steel
Supply Solutions Group Pack Quantity	5 Discs

Klingspor's current Australian technical sheet specifically confirms catalogue number 322772 as the 125 x 22.23mm P40 SMT 624 Supra, with a maximum operating speed of 80m/s / 12,250 RPM. (Klingspor)

Important packaging note: Klingspor's current manufacturer technical sheet lists its standard packing unit for 322772 as 10 pieces, while this Supply Solutions Group product is specifically sold as a Box of 5. (Klingspor)

Typical Applications

• Aggressive stock removal

• Weld seam grinding

• Weld bead removal

• Weld blending

• Edge grinding

• Edge preparation

• Beveling

• Chamfering

• Surface preparation

• Steel fabrication

• Stainless-steel fabrication

• Metal finishing

• Fabrication repairs

• Structural steelwork

• Workshop maintenance

• General metalworking

Suitable Industries

• Welding and fabrication

• Engineering

• Mining and resources

• Construction

• Manufacturing

• Structural steel

• Metal fabrication

• Stainless-steel fabrication

• Industrial maintenance

• Automotive

• Transport

• Infrastructure

• Utilities

• Mechanical workshops

• Trades and contracting

Why Choose Klingspor SMT 624 Supra 40 Grit?

The SMT 624 Supra is designed for applications requiring:

Aggressive Stock Removal + High Removal Rate + Strong Service Life

Klingspor describes the SMT 624 Supra as suitable for demanding grinding work on steel and stainless steel, with aggressive stock removal and comfortable grinding behaviour. (Klingspor)

The P40 grit version is particularly useful when significant amounts of material need to be removed quickly.

Typical tasks include:

• Removing excess weld metal

• Grinding down weld seams

• Preparing edges before welding

• Removing surface imperfections

• Creating bevels

• Heavy surface preparation

Zirconia Alumina Abrasive Grain

The SMT 624 uses:

Zirconia Alumina

abrasive grain. (Klingspor)

Zirconia alumina is well suited to demanding metal grinding where aggressive cutting performance and useful abrasive life are required.

This makes the SMT 624 suitable for professional fabrication and maintenance applications involving steel and stainless steel.

P40 Coarse Grit

This model uses:

P40 Grit

which is considerably more aggressive than finer flap-disc grits such as P60, P80 or P120.

P40 is particularly useful for:

• Heavy weld removal

• Rapid stock removal

• Edge preparation

• Surface levelling

• Removing imperfections

• Initial grinding stages

Where a smoother final finish is required, the P40 disc can be followed by progressively finer abrasive grades.

125mm Diameter

Each flap disc has a nominal diameter of:

125mm

making it suitable for compatible 125mm angle grinders operating within the abrasive disc's specified limits.

22.23mm Bore

Klingspor's precise manufacturer specification is:

22.23mm Bore. (Klingspor)

The product may also be commercially described as:

22.3mm

or simply:

22mm

depending on the distributor.

Always confirm that the disc bore and mounting arrangement are compatible with the intended angle grinder.

12° Convex Design

The SMT 624 features a:

12° Convex Profile. (Klingspor)

This angled configuration is particularly effective when grinding:

• Edges

• Weld seams

• Bevels

• Chamfers

• Smaller metal surfaces

The convex design concentrates the abrasive contact area, helping deliver aggressive material removal in demanding fabrication applications.

Glass-Fibre Backing Plate

The SMT 624 uses a:

Glass-Fibre Backing Plate. (Klingspor)

The backing supports the abrasive flaps during high-speed grinding and contributes to the disc's overall stability during use.

Steel Applications

Klingspor specifies the SMT 624 for:

Steel. (Klingspor)

Typical steel applications include:

• Structural fabrication

• Weld removal

• Edge preparation

• General grinding

• Surface preparation

• Maintenance repairs

Stainless Steel Applications

The SMT 624 is also specifically suitable for:

Stainless Steel. (Klingspor)

Where contamination control is important, abrasive products and grinding equipment should be managed according to the organisation's stainless-steel fabrication procedures.

Weld Grinding

The aggressive P40 abrasive makes catalogue number 322772 particularly suitable for processing weld seams.

Applications can include:

• Removing excess weld material

• Grinding weld beads

• Levelling welded joints

• Preparing welded areas for further finishing

• Blending fabricated components

The 12° convex design is particularly advantageous when working on welds, edges and smaller surfaces. (Gasweld)

Edge Grinding

The convex profile makes the SMT 624 particularly useful for:

Edge Grinding

where concentrated abrasive contact is required.

This can include edge clean-up before or after welding and general fabrication work.

Beveling & Chamfering

Klingspor identifies chamfering as an application where the SMT 624's convex design performs particularly well. (Gasweld)

Typical applications include:

• Weld preparation

• Creating bevelled edges

• Removing sharp edges

• Preparing fabricated components

Uniform Scratch Pattern

The fan-shaped arrangement of the abrasive flaps produces a comparatively uniform scratch pattern during grinding.

This can help reduce unnecessary reworking even when using coarse abrasive grades. (Gasweld)

Maximum 12,250 RPM

For catalogue number 322772, Klingspor specifies:

Maximum RPM: 12,250

and:

Maximum Peripheral Speed: 80m/s. (Klingspor)

Never operate the disc above the maximum speed marked on the abrasive.

The grinder and abrasive must be correctly matched before use.

Compatible Angle Grinders

The SMT 624 Supra is suitable for compatible conventional angle grinders. (Mektronics Australia)

Before installation, check:

• Grinder disc capacity

• Spindle and bore compatibility

• Maximum grinder speed

• Correct flange and mounting hardware

• Grinder guard

• Disc condition

Only use the abrasive according to the grinder and abrasive manufacturers' instructions.

Box of 5

This Supply Solutions Group listing contains:

5 × Klingspor SMT 624 Supra P40 Flap Discs. (Supply Solutions Group Pty Ltd)

The 5-disc configuration provides a practical quantity for:

• Fabricators

• Maintenance teams

• Workshops

• Tradespeople

• Site tool stores

• Engineering departments

For organisations with higher consumption, bulk and recurring quantities can be arranged.

Safety Considerations

Angle grinding can produce sparks, abrasive fragments, metal particles, dust and significant noise.

Appropriate workplace controls and PPE should be selected for the specific task, which may include:

• Safety glasses or goggles

• Face protection

• Hearing protection

• Appropriate gloves

• Protective clothing

• Safety footwear

• Respiratory protection where required

Always inspect the abrasive before use and follow the grinder manufacturer's and Klingspor's safety instructions.

Storage & Handling

For best abrasive condition:

• Store in a clean, dry environment

• Protect from moisture

• Avoid excessive heat

• Do not bend or crush discs

• Keep discs appropriately packaged until required

• Inspect before mounting

• Do not use damaged abrasive products

• Follow manufacturer storage recommendations

Why Buy from Supply Solutions Group?

Supply Solutions Group supplies professional abrasives, grinding products, fabrication equipment, PPE and industrial consumables to organisations throughout Australia.

Benefits of Partnering with Supply Solutions Group

• Australia-wide business supply capability

• Indigenous-owned business

• Klingspor abrasives

• SMT 624 Supra flap discs

• Zirconia flap discs

• Grinding discs

• Cutting discs

• Sanding products

• Surface-conditioning products

• Welding consumables

• Fabrication supplies

• Angle-grinder accessories

• Safety eyewear

• Face protection

• Hearing protection

• Respiratory PPE

• Mining consumables

• Construction supplies

• Manufacturing supplies

• Industrial consumables

• Procurement consolidation

• Trade account options

• Bulk purchasing solutions

• Product sourcing assistance

• Responsive customer service

• Recurring commercial supply arrangements

Frequently Asked Questions

What is Klingspor 322772?
It is the SMT 624 Supra P40 zirconia alumina flap disc measuring 125 x 22.23mm. (Klingspor)

What grit is 322772?
P40 / 40 grit.

What size is the disc?
125mm diameter x 22.23mm bore. (Klingspor)

Why is the product sometimes listed as 22.3mm?
22.3mm is a rounded commercial description. Klingspor's technical sheet specifies the bore as 22.23mm. (Klingspor)

What abrasive grain does it use?
Zirconia alumina. (Klingspor)

What backing plate does it use?
Glass fibre. (Klingspor)

What shape is the disc?
It has a convex profile.

What is the convex angle?
12°. (Klingspor)

What is P40 grit best suited to?
P40 is a coarse abrasive suited to aggressive stock removal, weld grinding, edge preparation and other applications where rapid material removal is required.

Is it suitable for steel?
Yes. (Klingspor)

Is it suitable for stainless steel?
Yes. (Klingspor)

Can it be used for weld grinding?
Yes. Its aggressive P40 grit and convex profile make it particularly useful for weld processing.

Can it be used for edge grinding?
Yes. The 12° convex profile is well suited to edge grinding. (Gasweld)

Can it be used for beveling or chamfering?
Yes. Chamfering is specifically identified as an application for the SMT 624. (Gasweld)

What is the maximum operating speed?
Klingspor specifies 12,250 RPM and 80m/s for catalogue number 322772. (Klingspor)

How many discs are included in this listing?
This Supply Solutions Group listing contains 5 discs. (Supply Solutions Group Pty Ltd)

Does Klingspor normally pack 322772 in units of 10?
Yes. Klingspor's current technical sheet lists a standard manufacturer packing unit of 10 pieces. This particular Supply Solutions Group listing is a Box of 5. (Klingspor)

Is this the same disc as the 60 grit 322774?
They belong to the same SMT 624 Supra family and have the same 125 x 22.23mm dimensions, but 322772 is P40, while 322774 is P60. (Klingspor)

Can Supply Solutions Group provide other SMT 624 grits?
Yes. Klingspor's current 125 x 22.23mm SMT 624 range includes P36, P40, P60, P80 and P120 versions. (Klingspor)

Can Supply Solutions Group provide bulk or recurring quantities?
Yes. Bulk and ongoing procurement arrangements are available for fabricators, engineering workshops, mine sites, construction businesses, manufacturers and industrial maintenance operations.