Important points to take into account when sizing a honeycomb core.

The thickness of the core.

The width of the roll dictates the thickness of the core to be made.

The height of the core.

The height of the core is governed by the hexagon make up of the core. 8mm hexagons and a lock-seam top and bottom mean the cut length of the stamped film has to allow an extra 16mm in length which is then used in creating the lock-seams. The double-folded lock-seam actually uses half a hexagon. By using the chart below, you can see the core heights available in honeycomb cores. Any core heights between these sizes can usually be made up simply by going to the next size up and forming the core back to the required height by using a hammer to knock the core shorter. 6mm is only 3mm each end which can be accomplished easily.

The width of the core.

The width of the core is also controlled by the make up of the hexagon core; the pitch of the VHRC core is 9mm. That is, the core width is made up in 9mm increments. Again, look at the chart below to see the core widths available.

Example.

Suppose you measure the height of your core as 385mm. As you can see from the first column, the only choices near that value are 379 and 395.

That is, you will need to chose one of those; we recommend the larger value of 395, as the core can be knocked shorter with a hammer.

The film length we would then use to make that core is 411mm.

For the width, suppose you measure 355mm. That will mean choosing between 351 or 360 (from the "Finished Core Width" column). We will then use 39 or 40 tubes, respectively, to construct that.

Height Film Length less approx. 16mm = Core Height		Width
Finished Core Height	Film Length	Finished Core Width	Number of Tubes
272	288	297	33
287	303	306	34
303	319	315	35
318	334	324	36
333	349	333	37
349	365	342	38
364	380	351	39
379	395	360	40
395	411	369	41
410	426	378	42
426	442	387	43
441	457	396	44
459	475	405	45
472	488	414	46
487	503	423	47
502	518	432	48
518	534	441	49
533	549	450	50
549	565	459	51
564	580	468	52
579	595	477	53
595	611	486	54
610	626	495	55
625	641	504	56
641	657	513	57
646	662	522	58
672	688	531	59
687	703	540	60
703	719	549	61
718	734	558	62
733	749	567	63
749	765	576	64
How length is reduced by lock-seams. Click for a larger image.		585	65
		594	66
		603	67
		612	68
		621	69
		630	70
		639	71
		648	72
		657	73
		666	74
		675	75
		684	76
		693	77
		702	78
		711	79
		720	80
		729	81
		738	82
		747	83
		756	84