The Razorback CRB-15 Soft Brush Set (Black) is a genuine replacement/optional brush pair for the Razorback CRB-15 Counter-Rotating Brush Agitation Machine. This soft-grade brush is designed for gentler agitation on residential synthetic cut pile carpet and commercial wool loop pile carpet, where a firmer standard or stiff brush could be too aggressive on delicate fibres.

Compatibility

This brush set is designed to fit the Razorback CRB-15 Counter-Rotating Brush Agitation Machine, which uses a 400mm (15") brush track and a tool-free axle-slide brush change system. Before ordering, confirm your machine is the CRB-15 (or an equivalent 15" counter-rotating brush machine using the same axle-mounted brush design), as brush dimensions are not interchangeable with narrower or wider CRB models.

The CRB-15 brush range covers four grades, each intended for a different carpet condition:

Soft – residential synthetic cut pile or commercial wool loop pile carpet (this listing)
Standard – commercial grade level loop and low cut pile carpet
Stiff – commercial synthetic fibre cut pile carpet
Extra Stiff – heavily matted commercial low pile carpet; intended for one-off restorative cleans only, not regular use

Razorback CRB-15 brush grade reference chart showing soft, standard, stiff and extra stiff brush types

Important: Brush colour-coding for CRB-style machines is not fully standardised across suppliers. This particular brush set is Black. CCW's own CRB-15 machine listing describes its optional soft brush as White and its stiff brush as Brown, and other suppliers of similar 15" counter-rotating brush machines commonly use Grey for soft and Yellow for extra stiff. Colour alone is not a reliable way to confirm brush grade. If you are unsure which grade you currently have fitted, or which grade suits your carpet, contact CCW to confirm before ordering, or compare bristle stiffness directly against your existing brush.

Why Brush Grade Matters

Using the wrong brush grade on a counter-rotating machine can affect both cleaning results and carpet condition. A brush that is too stiff for a delicate synthetic cut pile can fray or distort the fibres over repeated passes, while a brush that is too soft for heavily matted commercial carpet may not provide enough mechanical agitation to lift embedded soil before extraction. Matching brush grade to carpet type helps protect the customer's carpet and gets more consistent results from the pre-spray or encapsulation process.

Key Features

Soft-grade bristles suited to residential synthetic cut pile and commercial wool loop pile carpet
Supplied as a matched pair (2 brushes) for even, balanced agitation across the CRB-15's 400mm brush track
Tool-free axle-slide fitting, consistent with the CRB-15's designed brush-change system
Lightweight design (2.4kg per pair) for easy handling during brush changes

Fitting & Care Advice

The CRB-15 is designed for tool-free brush changes: release the foot lever, slide out the axle, remove the worn brush pair, fit the replacement pair, then slide the axle back into place. Always match brush grade to the carpet being cleaned rather than defaulting to whichever brush is on hand. Inspect bristles periodically for wear, flattening, or embedded debris, and store spare brush sets away from direct sunlight and heat, which can degrade bristle material over time.

Technical Specifications

Brush grade	Soft (Black)
Set contents	1 pair (2 brushes)
Weight	2.4kg per pair
Compatible machine	Razorback CRB-15 Counter-Rotating Brush Agitation Machine (400mm / 15" brush track)
Recommended surfaces	Residential synthetic cut pile carpet, commercial wool loop pile carpet
SKU	RB-CRB15-BLACK

Why Buy from Carpet Cleaners Warehouse?

CCW stocks genuine replacement brush sets for the equipment we sell, so you can keep your CRB-15 running at its best without waiting on freight from overseas. Our team can help confirm brush compatibility and grade selection before you order, reducing the risk of purchasing the wrong part.

FAQ

What is the difference between the four CRB-15 brush grades?

Each grade is built for a different carpet condition, from soft bristles for delicate residential synthetic pile through to extra stiff bristles for heavily matted commercial carpet requiring a one-off restorative clean. See the Compatibility section above for guidance on which grade suits which carpet type.

Will this brush set fit my CRB-15 machine?

Yes, this soft brush set is designed for the Razorback CRB-15 Counter-Rotating Brush Agitation Machine and its 400mm (15") brush track. If your machine is a different width or a different brand, check with CCW before ordering.

How do I change the brushes on my CRB-15?

The CRB-15 uses a tool-free axle-slide system. Release the foot lever, slide out the axle, remove the old brush pair, fit the new pair, then return the axle to lock the brushes in place.

How often should I replace the brushes?

Replacement frequency depends on usage volume and carpet type. Inspect bristles regularly and replace the set once bristles are visibly flattened, worn short, or no longer agitate the carpet effectively.

Can I use the soft brush set on hard flooring?

This soft grade is intended for carpet rather than hard flooring. For hard floor work, a dedicated hard floor brush or pad is a better match – check with CCW for the correct option for your surface.

The brush colour I received doesn't match what I expected. What should I do?

Brush colour-coding varies between suppliers of similar CRB-style machines, so colour alone isn't a reliable way to confirm grade. Contact CCW with your order details and we'll confirm the grade of the brushes you've received.

Not sure which CRB-15 brush grade you need, or whether this set fits your machine? Contact Carpet Cleaners Warehouse and our team will help you choose the correct brush pair before you order.