Why a Wide Blade Needs a Different Pass on a Curved Body

Understand how width changes control on curves, plan where to reposition and match wide guards to the correct base.

4 min read Updated 14 September 2026

A wide blade can cover a broad body section efficiently, then feel surprisingly awkward a few centimetres further round the same dog. The blade has not changed. The surface beneath it has.

Learning to recognise that transition is more useful than trying to steer every part of the groom with one long pass. A wider head gives you more coverage where you can control it. It also gives you more edge to account for when the body curves away.

Think about the whole width

Imagine placing a straight ruler across a curved surface. The middle and ends cannot all follow that curve in the same way. A blade and a dog's body are more complicated, but the comparison explains why the far corner of a wide head deserves attention.

Here is a simple geometry example. Across a circular curve with a 100 mm radius, a straight span of 40 mm has about 2.02 mm of difference between the arc's centre and the chord. At a 60 mm span, that difference is about 4.61 mm. Increasing width by half has more than doubled the geometric difference.

These are illustrative dimensions, not VUNRO blade measurements or a prediction of remaining coat length. Dogs have changing contours, skin and coat; they are not rigid cylinders. The calculation simply shows why a modest increase in width can matter on a curve.

Find the point where the route changes

Before clipping, look at where a broad working area becomes a narrower or more curved one. Consider the shoulder transition, the approach to a leg and the limits of visibility from your current position. Do not assume that a route suitable for the middle of the body remains suitable all the way to its edge.

Choose a point to stop and reposition while you still have control. Shorter planned passes can be more useful than a long pass that ends with you reaching, twisting your wrist or losing sight of the far corner.

Do not solve the curve with pressure

Pressing harder to make the whole blade follow a contour is not a sound correction. Nor is tipping a corner into the coat to reach a small missed strip. Stop, reassess your approach and use an appropriately sized tool for the area.

If you are learning wide-blade work, practise the movement with the clipper off and away from the dog first, then work under suitable supervision. The lesson is where to change your route, not how to force one width around every shape.

Keep a standard-width option beside the wide blade

The VUNRO #5FW steel A5 blade has a nominal 6.4 mm cutting length. A standard-width #5F steel A5 blade offers the same nominal length with a different working width. Both belong to the A5 system; a D-Series clipper requires its own compatible D-Series blades.

Having both widths can give you a sensible division of work: broad accessible sections and areas where a narrower head is more manageable. Check the actual finish as you change tools. Matching the number on the blade does not guarantee an identical appearance across different coat directions and contours.

Do not confuse a wide blade with a wide-guard base

A #5FW is a cutting blade, not one of the specified bases for the ColorMax Wide Blade Guard Comb Set. That set requires compatible wide A5 #10W, #15W or #30W blades. If you are planning a longer guarded finish, choose the base and guard together.

Review the finished transition after the coat settles, then record where you changed width or route. That makes the next groom more repeatable than a note saying only “used a wide blade”.

For direction changes, read Map the Coat Lay Before You Set the Outline. The mathematical example above is an original circle calculation; it is not an animal experiment. Product dimensions and fit should always come from the relevant product instructions.

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