# Inch ball bearings, 1600 series (1601 to 1658): 1601, 1602, 1603, 1604, 1605, 1614, 1620, 1630 bore, OD, width (open / ZZ and 2RS)

> What are the dimensions of a 1601, 1602, 1603, 1604, 1605, 1614, 1620 or 1630 inch ball bearing: bore, OD and width with ZZ shields and 2RS seals?

- Category: Hardware › Bearings, rails & motion
- Kind: Standard part
- Basis: Peer Bearing's 1600 series table (inch), agreeing with RBC's 1600 series list on bore, OD and (except 1603) width; 1601 confirmed by a listing
- Page: https://xemstudio.com/objects/ball-bearings-inch-1600-series/ · JSON: https://xemstudio.com/api/geometry?object=ball-bearings-inch-1600-series · Plain text: https://xemstudio.com/objects/ball-bearings-inch-1600-series/sheet.txt
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**Exact dimensions.** True size, with no tolerance added.

## Notes

- The 1600 series is the inch-size light-duty deep-groove ball bearing: 1601 is 3/16 in bore, 1602 and 1604 are 1/4 and 3/8 in bore, and the sizes run up to 1658 (1.3125 in bore). They are used in small pulleys, wheels and light machinery. Peer's table gives one width for open and ZZ (shielded) bearings and a wider 2RS (sealed) width for 1601 to 1604; for 1605 and up no 2RS width is stated.
- Numbers: Peer Bearing's 1600 series table (inch only; the mm columns here are inches times exactly 25.4, rounded to 0.01 mm). RBC (NICE) 1602 to 1657 via TFL Bearing agrees on bore and OD (rounded to two decimals there) on all 22 shared rows and on width for 21 of them. 1601 is confirmed by a distributor listing (open / ZZ 0.2500 in, 2RS 0.3125 in).
- Where the sources differ: 1603. Peer prints 0.2812 in for open / ZZ and 0.3438 in for 2RS; RBC prints 0.3438 in for every 1603 variant listed (shield and seal alike). Both are shown; check the width of the bearing in hand. For 1604, RBC's shielded variant is 0.2813 (equal to Peer's 0.2812) and its sealed one 0.3438 (Peer's 2RS).
- Files: none. The sources give no chamfer r min for this series, so no ring envelope is drawn (an envelope needs bore, OD, width and r).
- Left out: the gaps in the numbering (1608 to 1613, 1617 to 1619, 1624 to 1627 and so on are not in the sources read; they are not stated to be unused), flanged versions, 2RS widths for 1605 and up, tolerances, loads, speeds, metric equivalents (6000 series pages).

## Sizes

| part | bore, in | OD, in | width open / ZZ, in | width 2RS, in | bore, mm (x 25.4) | OD, mm | width open / ZZ, mm | source |
|---|---|---|---|---|---|---|---|---|
| 1601 | 0.1875 | 0.6875 | 0.2500 | 0.3125 | 4.76 | 17.46 | 6.35 | Peer; USABB (1601) |
| 1602 | 0.2500 | 0.6875 | 0.2500 | 0.3125 | 6.35 | 17.46 | 6.35 | Peer + RBC |
| 1603 | 0.3125 | 0.8750 | 0.2812 | 0.3438 | 7.94 | 22.23 | 7.14 | Peer; RBC (width 0.3438 in) |
| 1604 | 0.3750 | 0.8750 | 0.2812 | 0.3438 | 9.53 | 22.23 | 7.14 | Peer + RBC |
| 1605 | 0.3125 | 0.9062 | 0.3125 | not stated | 7.94 | 23.02 | 7.94 | Peer + RBC |
| 1606 | 0.3750 | 0.9062 | 0.3125 | not stated | 9.53 | 23.02 | 7.94 | Peer + RBC |
| 1607 | 0.4375 | 0.9062 | 0.3125 | not stated | 11.11 | 23.02 | 7.94 | Peer + RBC |
| 1614 | 0.3750 | 1.1250 | 0.3750 | not stated | 9.53 | 28.58 | 9.53 | Peer + RBC |
| 1615 | 0.4375 | 1.1250 | 0.3750 | not stated | 11.11 | 28.58 | 9.53 | Peer + RBC |
| 1616 | 0.5000 | 1.1250 | 0.3750 | not stated | 12.70 | 28.58 | 9.53 | Peer + RBC |
| 1620 | 0.4375 | 1.3750 | 0.4375 | not stated | 11.11 | 34.93 | 11.11 | Peer + RBC |
| 1621 | 0.5000 | 1.3750 | 0.4375 | not stated | 12.70 | 34.93 | 11.11 | Peer + RBC |
| 1622 | 0.5625 | 1.3750 | 0.4375 | not stated | 14.29 | 34.93 | 11.11 | Peer |
| 1623 | 0.6250 | 1.3750 | 0.4375 | not stated | 15.88 | 34.93 | 11.11 | Peer + RBC |
| 1628 | 0.6250 | 1.6250 | 0.5000 | not stated | 15.88 | 41.28 | 12.70 | Peer + RBC |
| 1630 | 0.7500 | 1.6250 | 0.5000 | not stated | 19.05 | 41.28 | 12.70 | Peer + RBC |
| 1633 | 0.6250 | 1.7500 | 0.5000 | not stated | 15.88 | 44.45 | 12.70 | Peer + RBC |
| 1635 | 0.7500 | 1.7500 | 0.5000 | not stated | 19.05 | 44.45 | 12.70 | Peer + RBC |
| 1638 | 0.7500 | 2.0000 | 0.5625 | not stated | 19.05 | 50.80 | 14.29 | Peer + RBC |
| 1640 | 0.8750 | 2.0000 | 0.5625 | not stated | 22.23 | 50.80 | 14.29 | Peer + RBC |
| 1641 | 1.0000 | 2.0000 | 0.5625 | not stated | 25.40 | 50.80 | 14.29 | Peer + RBC |
| 1652 | 1.1250 | 2.5000 | 0.6250 | not stated | 28.58 | 63.50 | 15.88 | Peer + RBC |
| 1654 | 1.2500 | 2.5000 | 0.6250 | not stated | 31.75 | 63.50 | 15.88 | Peer + RBC |
| 1657 | 1.2500 | 2.5625 | 0.6875 | not stated | 31.75 | 65.09 | 17.46 | Peer + RBC |
| 1658 | 1.3125 | 2.5625 | 0.6875 | not stated | 33.34 | 65.09 | 17.46 | Peer |

## Where the files are

- Peer Bearing Company (1600 series, inch): [1600 series inch deep-groove ball bearings 1601 to 1658: bore, OD, width open / ZZ and 2RS](https://cdn.shopify.com/s/files/1/0263/9193/7069/files/1600_series_inch.pdf) — web — Publisher's page; dimensions are facts
- TFL Bearing (RBC Nice 1600 series): [1600 series deep groove ball bearings 1602 to 1657: bore, OD, width (shield and seal variants)](https://tflbearing.com/?p=2619) — web — Publisher's page; dimensions are facts
- USA Bearings and Belts (listing title): [1601-2RS, 1601-ZZ ball bearings, 0.1875 x 0.6875 x 0.3125 / 0.1875 x 0.6875 x 0.25 in](https://www.usabearingsandbelts.com/m7/3/16%20X%2011/16%20X%205/16--3-16-x-11-16-x-5-16-ball-bearings.html) — web — Publisher's page; dimensions are facts

## Questions

**What are the dimensions of a 1601 bearing?**

Bore 0.1875 in (3/16), OD 0.6875 in (11/16), width 0.2500 in open / ZZ and 0.3125 in 2RS (Peer).

**What are the dimensions of a 1602 bearing?**

Bore 0.2500 in, OD 0.6875 in, width 0.2500 in open / ZZ and 0.3125 in 2RS.

**What are the dimensions of a 1603 bearing?**

Bore 0.3125 in, OD 0.8750 in; width 0.2812 in open / ZZ and 0.3438 in 2RS per Peer (RBC lists 0.3438 in for all 1603 variants).

**What are the dimensions of a 1604 bearing?**

Bore 0.3750 in (3/8), OD 0.8750 in (7/8), width 0.2812 in open / ZZ and 0.3438 in 2RS.

**What are the dimensions of a 1630 bearing?**

Bore 0.7500 in, OD 1.6250 in, width 0.5000 in.

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