Bosch 2608650551 Review

A reciprocating saw is one of the most versatile demolition and rough-cutting tools you can own. It tears through timber, slices through plastic pipe, and — with the right blade — cuts metal, plasterboard, and even brick. But the saw itself is only half the equation. The blade you fit determines everything: how fast it cuts, how clean the finished edge looks, how long the blade lasts, and whether it can reach into tight spaces. A poorly chosen blade overheats, wanders off the cut line, and leaves splintered edges that need extensive clean-up. A quality blade matched to the material makes the saw feel like a completely different tool — fast, controlled, and precise. For professionals in construction, demolition, plumbing, and tree surgery, as well as serious DIY renovators, keeping a selection of task-specific blades on hand transforms the reciprocating saw from a rough wrecking tool into a genuinely precise cutting instrument. And because blades are consumables — they wear out, snap, and dull — buying in bulk not only saves money but ensures you never find yourself mid-job with a blunt blade and no spare.

Bosch Professional (the blue range, distinct from Bosch's green DIY line) manufactures some of the most respected saw blades in the industry, with many produced in Switzerland — a country with a long tradition of precision blade making. The S 644 D is a 150 mm wood-cutting blade with a fully tapered body, a pointed tip for plunge cuts, and aggressive tooth geometry for fast cutting in softwood, timber, and non-abrasive wood-based materials. When selecting reciprocating saw blades, the key factors are blade length (determining maximum cut depth), tooth count and geometry (coarse for speed, fine for finish), blade thickness and taper (affecting flexibility and access), and shank type (universal ½-inch fits all major brands). The S 644 D uses high carbon steel — an economical material well suited to clean wood where abrasive wear is low.

This review examines the Bosch Professional S 644 D Top for Wood reciprocating saw blades, supplied in a bulk pack of 100. We assess cutting speed, blade life, splinter control, plunge-cutting capability, and overall value compared to buying blades individually or in smaller multipacks.

Each S 644 D blade measures 150 mm in length, 19 mm in width, and 1.25 mm in thickness, with a tooth count of approximately 100 teeth along the cutting edge. The fully tapered body design means the blade narrows from the shank towards the tip, creating a slim profile that manoeuvres easily into tight spaces and allows curved or radius cuts — particularly useful when cutting pipe or conduit in confined areas where a straight, wide blade would bind. The pointed, spear-shaped tip is purpose-designed for plunge cuts: the operator can start the cut in the middle of a panel, such as cutting a socket opening in a plasterboard wall or a vent hole in a wooden floor, without needing to drill a starter hole or cut in from the edge. The universal ½-inch shank fits all reciprocating saws from Bosch, DeWalt, Makita, Milwaukee, and other major brands.

The blade material is high carbon steel (HCS), the standard choice for clean wood cutting. HCS blades offer an excellent balance of sharpness, flexibility, and cost — they cut fast in softwood, timber, plywood, MDF, and veneered panels without the premium price of bi-metal or carbide-tipped blades. The trade-off is that HCS dulls quickly if used on abrasive materials like chipboard with high glue content, plasterboard, or any material containing hidden nails. For its intended application — clean timber, softwood, and wood-based boards — HCS is the optimal material choice. The tooth geometry uses sharp, aggressive teeth spaced for fast chip clearance, producing a relatively clean cut with minimal splintering on the exit side.

In use, the S 644 D transforms the cutting behaviour of a reciprocating saw. The aggressive tooth profile bites quickly and clears chips efficiently, preventing the blade from clogging and overheating in green or resinous timber. The 100 mm effective cutting capacity handles most common demolition and rough-carpentry tasks — cutting through floorboards, studs, joists, and fence posts. The tapered body makes the blade noticeably more manoeuvrable than straight-sided alternatives when cutting curves, trimming branches in situ, or working in awkward positions under floors or inside wall cavities. The plunge-cut tip is genuinely effective: press the tip against the material at an angle, start the saw, and gradually pivot the blade upright as it penetrates — a clean starter hole without drilling.

The 100-blade bulk pack is aimed squarely at professional users and high-volume DIY renovators. At approximately 1.54 euros per blade, the bulk price represents a significant saving over buying blades in packs of 5 or 10, where individual blade costs can be two to three times higher. For a demolition contractor, kitchen fitter, or renovation specialist who goes through several blades per week, the bulk pack eliminates the frustration of running out mid-job and the inflated cost of emergency small-pack purchases from a builders' merchant. The pack is compact and easy to store in a van or workshop drawer.

Bosch manufactures these blades in Switzerland, a mark of precision engineering in a category where tooth geometry and heat treatment directly determine performance. The blades carry a lifetime warranty against manufacturing defects — a strong statement of quality confidence from Bosch. Customer reception is outstanding: the S 644 D holds a 4.7 out of 5 stars rating from more than 1 700 reviews on Amazon and ranks as the number 2 bestseller in reciprocating saw blades — a remarkable position that reflects consistent quality and excellent value. The blades are compatible with all saws using the standard ½-inch universal shank, which covers essentially every reciprocating saw on the market.

The Bosch S 644 D 100-pack is built for professional carpenters, demolition contractors, kitchen fitters, and serious renovators who burn through multiple wood-cutting blades per week and want the best per-unit price without compromising on Swiss-made quality.