{"id":979,"date":"2026-10-27T06:53:22","date_gmt":"2026-10-27T06:53:22","guid":{"rendered":"https:\/\/konokwelding.com\/?post_type=product&#038;p=979"},"modified":"2026-10-29T00:46:07","modified_gmt":"2026-10-29T00:46:07","slug":"d28-400x200-square-u-shape-riser-block","status":"publish","type":"product","link":"https:\/\/konokwelding.com\/es\/producto\/d28-400x200-square-u-shape-riser-block\/","title":{"rendered":"D28-400&#215;200 Square U-Shape Riser Block"},"content":{"rendered":"<h3>Description<\/h3>\n<p>Our KONOK Square U-Shape Riser Block delivers high strength and reliable stability for on-demand welding table extensions and vertical fixturing. Featuring 5 precision-machined working surfaces, it seamlessly extends support and clamping space, creating flexible fixturing zones for modular welding setups &#8211; no need for a larger fixed table.<\/p>\n<h3>Key Features<\/h3>\n<ul>\n<li>Available in sizes from 500\u00d7400\u00d7200mm up to 4000\u00d7400\u00d7200 mm.<\/li>\n<li>Joins with connection bolts to create long reach, stable extensions for welding tables or vertical setups.<\/li>\n<li>25mm wall thickness delivers excellent stability and high load capacity.<\/li>\n<li>100mm grid pitch enables fast, accurate and repeatable alignment.<\/li>\n<li>Five-sided boreholes plus diagonal hole layout maximize clamping and positioning flexibility.<\/li>\n<li>Rear mounting holes for support legs are only provided on lengths \u2265 1000mm.<\/li>\n<li>Optional nitrided surface resists welding spatter, abrasion and corrosion for longer service life.<\/li>\n<li>Fully compatible with 28mm metric series welding tables.<\/li>\n<\/ul>\n<h3>Specifications<\/h3>\n<h4>Base Technical Data<\/h4>\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Parameter<\/th>\n<th scope=\"col\">Value<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Hole System<\/td>\n<td>D28 (28mm)<\/td>\n<\/tr>\n<tr>\n<td>Material<\/td>\n<td>Q355B<\/td>\n<\/tr>\n<tr>\n<td>Plate Thickness<\/td>\n<td>25mm<\/td>\n<\/tr>\n<tr>\n<td>Surface Finish<\/td>\n<td>Default: Black Oxide\/ Blackening; Optional: Nitriding<\/td>\n<\/tr>\n<tr>\n<td>Flatness<\/td>\n<td>0.1\/1000mm<\/td>\n<\/tr>\n<tr>\n<td>Parallelism<\/td>\n<td>0.1\/1000mm<\/td>\n<\/tr>\n<tr>\n<td>Perpendicularity<\/td>\n<td>0.1\/200mm<\/td>\n<\/tr>\n<tr>\n<td>Surface Roughness<\/td>\n<td>Ra 1.6 \u03bcm (Fine machined surface)<\/td>\n<\/tr>\n<tr>\n<td>Hole Diameter &amp; Tolerance<\/td>\n<td>\u03d528.10\u00b10.05mm<\/td>\n<\/tr>\n<tr>\n<td>Hole Pitch<\/td>\n<td>100\u00b10.05mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>Commonly Used Size List<\/h4>\n<table>\n<thead>\n<tr>\n<th scope=\"col\">No.<\/th>\n<th scope=\"col\">Dimension L \u00d7 W \u00d7 H (mm)<\/th>\n<th scope=\"col\">Item No.<\/th>\n<th scope=\"col\">Weight (kg)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>500 \u00d7 400 \u00d7 200<\/td>\n<td>KND28-U0500B<\/td>\n<td>81<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>1000 \u00d7 400 \u00d7 200<\/td>\n<td>KND28-U1000B<\/td>\n<td>149<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>1200 \u00d7 400 \u00d7 200<\/td>\n<td>KND28-U1200B<\/td>\n<td>174<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>1500 \u00d7 400 \u00d7 200<\/td>\n<td>KND28-U1500B<\/td>\n<td>215<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>2000 \u00d7 400 \u00d7 200<\/td>\n<td>KND28-U2000B<\/td>\n<td>272<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>2400 \u00d7 400 \u00d7 200<\/td>\n<td>KND28-U2400B<\/td>\n<td>320<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>3000 \u00d7 400 \u00d7 200<\/td>\n<td>KND28-U3000B<\/td>\n<td>400<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>4000 \u00d7 400 \u00d7 200<\/td>\n<td>KND28-U4000B<\/td>\n<td>526<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>Description Our KONOK Square U-Shape Riser Block delivers high strength and reliable stability for on-demand welding table extensions and vertical fixturing. Featuring 5 precision-machined working surfaces, it seamlessly extends support and clamping space, creating flexible fixturing zones for modular welding setups &#8211; no need for a larger fixed table. Key Features Available in sizes from [&hellip;]<\/p>\n","protected":false},"featured_media":1242,"template":"","meta":{"_gspb_post_css":""},"product_brand":[],"product_cat":[37],"product_tag":[],"class_list":["post-979","product","type-product","status-publish","has-post-thumbnail","product_cat-support-components","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/konokwelding.com\/es\/wp-json\/wp\/v2\/product\/979","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/konokwelding.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/konokwelding.com\/es\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/konokwelding.com\/es\/wp-json\/wp\/v2\/media\/1242"}],"wp:attachment":[{"href":"https:\/\/konokwelding.com\/es\/wp-json\/wp\/v2\/media?parent=979"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/konokwelding.com\/es\/wp-json\/wp\/v2\/product_brand?post=979"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/konokwelding.com\/es\/wp-json\/wp\/v2\/product_cat?post=979"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/konokwelding.com\/es\/wp-json\/wp\/v2\/product_tag?post=979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}